# Cytomic > Sound Music Software > Generated by All in One SEO Pro v5.0.3, this is an llms-full.txt file, used by LLMs to index the site. ## Posts ### [Happy 17th Birthday to The Glue!](https://cytomic.com/happy-17th-birthday-to-the-glue/) **Published:** March 14, 2026 **Author:** cytomicadmin **Content:** ![Image of Cytom, Cytomic's speaker logo, holding a shiny gold helium balloon with The Glue logo on it, against black background with 70s style racing stripes of different warm colours and text reads "The Glue is 17 today!"](https://cytomic.com/wp-content/uploads/2026/03/glue-17th-bday-grad-ls-1024x732.png)Happy 17th Birthday to The Glue**[Cytomic](https://cytomic.com/)**‘s first product arrived 17 years ago and our lives have never been the same since! A very happy birthday to [**The Glue**](http://www.cytomic.com/glue), an industry standard, one of the earliest and best SSL G series bus compressors, still going strong. Thank you to all our customers who are using it to make amazing music. Whether used natively, or as part of [Ableton](https://www.ableton.com/en/), The Glue will continue to bring your mixes together by controlling dynamics in a transparent way, for years to come. And listen out for upcoming news about The Glue 2… But don’t worry, support and sales of v1 will continue, as we will sell both versions as parallel products. Existing Cytomic Glue customers will get an automatic update to version 2. **Categories:** News **Tags:** Analog Modelling, The Glue **News categories:** PRODUCTS NEWS --- ### [Andy chats to Mr Bill: Two Aussies in Audio](https://cytomic.com/mr-bills-podcast/) **Published:** July 25, 2025 **Author:** cytomicadmin **Content:** Recently, Andy was delighted to be a guest on Mr Bill’s podcast, and you can listen to them audio geek out for an hour and a half here: <https://mrbillstunes.libsyn.com/mbp-174-andrew-simper> ![Mr Bil's graphic where a mysterious figure sits at a desk with scattered objects including a raven and a steaming cup of coffee. The steam forms the words The Mr Bill Podcast over the hooded figure's head.](https://cytomic.com/wp-content/uploads/2025/08/billpodcast.png) **Summary** Bill Day (aka Mr Bill) and Andy Simper had a great chat, where they discussed a huge range of aspects of Andrew’s work, in depth. From audio programming and DSP algorithms, to the past, evolution and future of music production tools, Andrew outlines the challenges of hardware development, like optimising CPU, and recalls his early days of writing VST plugins. Cytomic’s compressor, The Glue, has been part of Ableton Live since 2013, and he has contributed to Ableton’s filters and EQ8. The conversation also explores the technicalities of filters, the transition from bi-quad to state variable filters, and the nuances of summing engines in audio quality. Throughout, they emphasize the importance of efficiency in DSP and the future of audio processing. It was a great chat, thanks Mr Bill! **Chapters** 00:00 Introduction and Background 06:02 Early Days of Audio Programming 11:56 The Glue Compressor and Its Impact 18:01 The Transition to Better Algorithms 23:55 The Future of Audio Processing 30:33 Understanding Audio Summing and Its Implications 36:06 The Complexity of DSP Equations 41:18 Optimizing CPU Usage in Audio Plugins 52:12 Challenges in Audio Feature Extraction 59:17 The Complexity of Circuit Simulation 01:06:18 Modeling Analog Gear: The Importance of Realism 01:11:39 Criteria for Meaningful Emulation vs. Mimicry 01:20:40 Imagining Unlimited Computational Power in DSP 01:25:42 Unsolved Problems in Digital Signal Processing More about Cytomic’s partnership with Ableton here: <https://www.ableton.com/en/blog/cytomic-on-ableton-partnership> and here: <https://cytomic.com/ableton-and-cytomic/> **Categories:** News --- ### [Cytomic Drops a new filter into The Drop](https://cytomic.com/cytomic-drops-a-new-filter-into-the-drop/) **Published:** August 4, 2025 **Author:** cytomicadmin **Content:** ## **MS20, OSCar, Jupiter 8, SH101, Prodigy…** These are names with pedigree, gravitas and a lot of history—and great music—behind them. All these famous synths have been loved for decades for their distinctive warmth and growly tones. The main filters from each one of these synths are replicated in The Drop, all with Cytomic’s precision modelling. Released in 2012, The Drop gives you: - MS1 and MS2: Korg MS20 rev 1 (BJT SKF Sallen Key Filter) and rev2 (OTA SKF) - OSR: Oxford Synthesizer Co. OSCar (SVF State Variable Filter) - JRP: Roland Jupiter 8 / Juno 6 (IR3109 OTA Cascade) - SHR: Roland SH101 / SH-09 (IR3109 OTA Cascade) and - PRD: Moog Prodigy (BJT Ladder Cascade) - WSP: Wasp filter with full frequency range stable self oscillation modifications (CMOS SVF) And, you also get: - SMP: Andy’s own filter creation, a custom filter half way between a Sallen Key and a SVF with an OTA filter core and strong resonance tone - AMU: a unique sounding transposed SVF as used in the Odyssey Mk1 - KSM: a variation on the MS2 SKF but with stronger resonance ### **But now, with added Prophet!** In case you need a little something extra, we’ve added another classic filter to the lineup, one of the most sought after filters ever made: - PT1: Prophet 5 rev1 discrete OTA cascade filter The PT1 filter—identical to the one released in our CF100 VCV Rack module—is a highly detailed analog model of the classic cascade filter found in the early Prophet synthesisers which used the SSM2040 filter chip. We also made a custom designed 4-pole high-pass version of the filter using the same filter core, and made sure each stage flips and clips the signal to make it as similar in operation to the low pass version as possible. Trial or buy now at <https://cytomic.com/product/drop/> Read review here <https://www.musicradar.com/reviews/tech/cytomic-the-drop-615520> **Categories:** News **Tags:** Analog Modelling, DSP, Prophet --- ### [The Scream, all done, and in Sound on Sound](https://cytomic.com/the-scream-all-done-and-in-sound-on-sound/) **Published:** April 10, 2025 **Author:** cytomicadmin **Content:** Cytomic has finished its third product, The Scream, a plugin emulation of the classic TS808 Tube Screamer by Ibanez, and Cytomic’s most detailed plugin yet. The Scream covers all the classic sounds you’d expect from one of the world’s favourite guitar overdrive pedals, **but also includes full editing of every parameter of the entire circuit,** so you can not only cover all the most popular mods, but also push into new territory. You can lower the drive high pass for use on bassier signals, or adjust the op-amp slew rate and output voltage clipping to add extra crunch to synths. You can use LEDs with non-linear diffusion capacitance for a smoother and more open drive sound, or even increase the power voltage and lower the dc-blocking filters to use for subtle bus warming. Then on top of that you can randomise everything, in stereo, so each and every track can have a different variation of the tone in seconds. The Scream is a true chameleon, an electronic circuit turned into infinitely malleable clay through accurate, detailed, and **efficient analog modelling that Cytomic always delivers**. But don’t take our word for it, read the recent review in Sound on Sound here: <https://www.soundonsound.com/reviews/cytomic-scream> Plus you can see Andy’s immaculate matching to the hardware in this video here: And… you can buy here: [Buy The Scream](https://cytomic.com/product/scream/) USD 29 / USD 20.30 if you are already a Cytomic customer and have spent USD 99 with us – you get it at 30% discount! As SOS says, it’s a steal! Our thanks to everyone who has already bought a copy – including everyone who has been enjoying The Scream from its long time in beta! Emma & Andy **Categories:** News **Tags:** Analog Modelling, DSP, Ibanez, TS-808, Tube Screamer **News categories:** MEDIA, PRODUCTS NEWS --- ### [Discrete Blackmer VCA](https://cytomic.com/discrete-blackmer-vca/) **Published:** April 9, 2025 **Author:** cytomicadmin **Content:** All Cytomic analog modelling DSP is written using a custom circuit modelling code generator, which we call “Cytomic Circuit Solver” or CCS for short. This way we can specify a circuit at a high level, and let CCS do the linear algebra to solve the system, and then apply symbolic simplifications to the solution. We can also generate code for different programming languages this way, but always use the same high level representation. When new methods or optimisations are added we can also re-generate the DSP quickly for all our products. The core analog modelling DSP in The Glue, The Drop, and The Scream are all generated by CCS, as well as DSP code licensed to Ableton for their various products. A series of statements lets CCS know which components to add, how to connect them together, and what their parameters are. Below is part of the code that specifies the MXR Phase 90 I posted about recently (<https://cytomic.com/mxr-phase-90-jfet-based-phaser/>). It isn’t exactly clear to understand which is connected to what, it’s very easy to make mistakes with the number of nodes, which lead to many hours of head scratching trying to work out why the LFO of the Phase 90 model initially didn’t work properly. Also each time a c++ file is changed CCS had to be recompiled before it could generate the code, and that time adds up. ``` cir.Add (ModelFactory::Create ("_1n914 d is=2.25n n=1.72 imax=0.1")); cir.Add (ModelFactory::Create ("_1n4733 d is=1.2f n=1 imax=0.5")); cir.Add (ModelFactory::Create ("_2n5952 njf beta=1.3m lambda=4m vto=-2")); cir.Add (new Ground ("v0", 0)); cir.Add (new VSource ("v2", 0, 100, "vbat")); cir.Add (new Resistor ("r15", 100, 101, "10k")); cir.Add (new Diode ("d1", 0, 101, "_1n914")); cir.Add (new VSource ("v3", 0, 104, "zener_v")); cir.Add (new Diode ("dz1", 101, 104, "_1n4733")); cir.Add (new Capacitor ("c8", 0, 101, "15u")); cir.Add (new Potentiometer ("rtrim", 0, 101, 102, "250k pos=trim")); cir.Add (new Resistor ("r20", 102, 103, "1meg")); cir.Add (new Capacitor ("c4", 101, 103, "47n")); ``` Over the past 3 months I’ve been very busy doing a large chunk of R&D to avoid these issues, and speedup our circuit modelling workflow. I use the excellent and free circuit simulator LTSpice (<https://www.analog.com/en/resources/design-tools-and-calculators/ltspice-simulator.html>) to check my results are as expected, and also check against the analog circuit I’m modelling to make sure I haven’t missed anything. If I have missed a behaviour then I update the circuit / parameters and check again, and this is repeated until I’m happy with the match. My long term aim was always to try and use LTSpice to draw the circuit and specify everything CCS needs to work. The LTSpice graphical program itself writes a plain text file called a “spice netlist” which it passes to its own internal simulator to model the circuit and generate data to plot. What if I could do the same, pass this spice netlist text file to my own solver, but instead of generating data to plot I could generate c++ code to compile to simulate the circuit? I’m happy to say that I managed to do just that! I can now draw a circuit using LTSpice, and specify some extra manual guidance information CCS needs, and do all this from within the LTSpice user interface! Part of the R&D involved was working out how best to get the information to CCS from LTSpice. Luckily LTSpice just ignores commands it doesn’t know about (thank you so much to the authors of LTSpice for doing this!). I can safely write my own custom spice directives in parallel to those needed for LTSpice to work, and even partially combine them. To make things clear all Cytomic specific custom spice directives begin with `.cy`, followed by the command. LTSpice can specify parameters to change via the `.param` command, for example a control voltage, or a current, or any other value you want to use somewhere else. I can wrap these in a `.cybegin` and `.cyend` block and so make these values parameters I can attach knobs to in my DSP. ``` .cybegin set .param vctrlp = 5m .param vctrln = 0m .param sym = 0.2 .cyend ``` By far the largest part of the R&D was improving the stability of how PN-Junctions were solved. These contain implicit exponential equations, which lead to what in mathematics are called “stiff differential equations”. When using numerical equation solving methods to iteratively step towards a solution it is easy to step too far and fail to solve the equations. It is also easy to not step far enough, and so take a long time to find the solution – both situations are bad. This is what Wikipedia has to say on the topic: > “Finding a convergent iterative formulation is an art, and every problem is different.” > [https://en.wikipedia.org/wiki/Diode\_modelling](https://en.wikipedia.org/wiki/Diode_modelling) Not very encouraging, it seems that coming up with such a system is a bit of a black art, and in the specific situation of efficient DSP where I can’t dynamically change the time step used is even more difficult. After a lot of trial an error and critical thinking, and about a solid month’s worth of work, I came up with a method that held promise. It tackled the very difficult case of a fully discrete transistor ladder filter with un-idealities including finite forward and reverse beta as well as parasitic pn-junctions and non-linear diffusion capacitances. But would the method be able to tackle a completely new circuit I’d never done before? One that has a very different topology to that of a transistor ladder? I tried it out on a basic model of the discrete Blackmer VCA circuit as shown below, which is from this article by Rod Elliot: <https://sound-au.com/articles/vca-techniques.html> ![](https://cytomic.com/wp-content/uploads/2025/04/blackmer-vca-schem-1024x759.png)The result? It worked perfectly! I had to double check to make sure, there is usually a mistake or something slightly wrong, but no, it was spot on to the results I got with LTSpice first try! The Blackmer VCA has exponential control of the input signal gain, and here is a plot of varying the positive control voltage from -100mV to 100mV, so from around -16dB to around +16dB gain. The number of iterations required to converge to an accurate solution is shown for each sample as an orange dot, the worst case is 9, and the average number of steps needed is just 2.4, which means the solver is very efficient. ![](https://cytomic.com/wp-content/uploads/2025/04/blackmer-vca-plots.png)It takes around 1 minute from making a change via the LTSpice user interface till I can hear the compiled version of the code. If I just want to change parameters of the model that can happen instantly, I just edit the parameter and re-initialise the model to use that value all while the plugin is loaded. This is absolutely brilliant, and something I’ve been working towards for the past 15 years, and I’ve finally got there. The Blackmer VCA is at the heart of many compressors, and a macro model of this device will be included in the HD mode for The Glue v2. Here is a plot of the harmonics generated by the circuit, which are low second (-84 dBFS) and third (-97 dBFS) order – it’s very clean, but this is with very well matched values in the model, and it’s easy to mismatch things as desired. ![](https://cytomic.com/wp-content/uploads/2025/04/blackmer-vca-scope-spec-1024x832.png)I wanted to have a listen to the VCA when triggered by an envelope, so I set one up, and had a listen, and compared it to a completely clean algorithmic VCA. I didn’t really notice the added drive too much from the Blackmer model, but I used a sine wave as the input – it may be more evident on a more complicated signal. I did notice a little extra thump from the control signal feedthrough of the Blackmer VCA, a little extra heft was definitely present, which is very promising news for how this will sound at the heart of The Glue v2. ![](https://cytomic.com/wp-content/uploads/2025/04/blackmer-vca-env-1024x774.png)So what’s next? An important part of spice modelling is something called a sub-circuit. This is where you can specify a chunk of a circuit to re-use multiple times, for example an integrated circuit like an op-amp or an OTA, which is great to hide the complexity of these devices, while still offering any level of detail required. Another extension is to add support for arbitrary non-linear equation defined devices. Supporting sub-circuits is fairly straightforward, supporting arbitrary equation defined devices will be more challenging, especially if exponential functions are involved, since then we’re back to the stiff equations of pn-junctions, but now they can appear in any form! Even LTSpice has trouble with certain equation defined devices. One option to support them is to use a sub-circuit to contain the equation defined devices, and then when CCS finds one it can replace it with a custom written and already optimised device for greater cpu efficiency and stability. I’ve already begun doing exactly this for Boyle type op-amp macro models, and the results are excellent. **Categories:** Notes **Tags:** Analog Modelling, Blackmer, CCS, LTSpice, The Glue, VCA --- ### [MXR Phase 90 JFET-based Phaser](https://cytomic.com/mxr-phase-90-jfet-based-phaser/) **Published:** January 1, 2025 **Author:** cytomicadmin **Content:** I’ve recently connected with Dillon Sharlet, who is the main author of the open source [LiveSpice](https://www.livespice.org) software. Our approaches to modelling are quite similar, we’ve both written our own CAS (computer algebra system) to symbolically solve the non-linear system of equations, and then generate code that is compiled to run the circuit in realtime. The main focus for Dillon is having a fast turnaround time between editing the circuit and being able to run it using a just-in-time compiler, at the cost of taking extra CPU to run. Cytomic focuses on taking longer to generate the code, which uses an offline C++ compiler with SIMD support to make the end simulation as efficient as possible for products, but takes longer to turn the circuit into something you can run and process audio through. In our discussions we used the TS808 circuit as a baseline to try different things out, and we have both improved upon our previous solving methods. I wanted to get another circuit to try out, so decided to have a go at the one Dillon said LiveSpice was the least efficient at solving, the MXR Phase 90. It’s a phaser circuit, and uses JFETs as voltage controlled resistors to change the cutoff frequency of 4 all-pass filters in series. The JFETs also add considerable distortion to the signal, which sounds great. For a rundown on the circuit head over to [ElectroSmash](https://www.electrosmash.com/mxr-phase90). I always like to hear what happens when you push the input signal really loud into a circuit, and in this case the input signal saturated the JFETs until it leaked into the Gate of the JFET, which is where the LFO signal is connected to wobble the phaser. Although it was interesting having the LFO wobble differently I also wanted to just listen to how it would sound if that didn’t happen. I removed the parasitic pn-junction diodes from the JFET model and had a listen, and it sounded much better to me, you could drive the signal into warm clipping without interrupting the slow wobble of the LFO. Normal guitar signals don’t get this loud, but in plugin land gain staging is easy, so why not? Here are a few audio examples of my Phase 90 model. I don’t have an analog pedal to compare against to match things properly, but it’s already sounding great to me. Here is how it sounds on some classic washy minor key electric guitar chords: Electric Guitar chords And here are a few examples on a 303 sample courtesy of the great people at [Acid Voice](https://www.acidvoice.com/tb_303_best_distortion_pedal.htm): 303 dry 303 medium drive 303 hard drive **Categories:** Notes **Tags:** Analog Modelling, LiveSpice, MXR, Phase 90, Phaser --- ### [Ableton and Cytomic](https://cytomic.com/ableton-and-cytomic/) **Published:** October 28, 2012 **Author:** cytomicadmin **Excerpt:**

“Cytomic is proud to announce a collaboration with Ableton, including the inclusion of The Glue as a native Live 9 device, and a new algorithm for their EQ 8 device...”

**Content:** “Cytomic is proud to announce a collaboration with Ableton, including the inclusion of The Glue as a native Live 9 device, and a new algorithm for their EQ 8 device…” Cytomic is proud to announce a collaboration with Ableton, including the inclusion of The Glue as a native Live 9 device, and a new algorithm for their EQ 8 device. The Live 9 device *Glue Compressor* features the same award winning algorithm of The Glue, as well as an integrated sidechain selection and EQ panel. The new algorithm for EQ 8 is an analog model of a linear SVF circuit, and as such shares the excellent noise performance, as well as ultra smooth modulation properties, of the ideal circuit. The cutoff of EQ 8 can be swept smoothly with automation without the horrible artefacts of commonly used EQ algorithms. Cytomic looks forward to helping out with further advice and improvements to the outstandingly intuitive and wonderful Live software made by Ableton. **Categories:** News **News categories:** COMPANY NEWS --- ### [10/10 for The Drop](https://cytomic.com/10-10-for-the-drop/) **Published:** January 1, 2015 **Author:** cytomicadmin **Excerpt:**

“Computer Music magazine has given The Drop 10/10 and all award badges…”

**Content:** “Computer Music magazine has given The Drop 10/10 and all award badges…” Computer Music magazine has given The Drop 10/10 and all award badges: Value, Performance, and the prestigious Editor’s Choice. Check out the full review in [Computer Music January 2015](http://www.musicradar.com/reviews/tech/cytomic-the-drop-615520). **Categories:** News **News categories:** AWARDS --- ## Pages ### [Welcome to Cytomic](https://cytomic.com/) **Published:** January 4, 2016 **Author:** cytomicadmin **Content:** Home, since 2009, to amazing music software written by Andrew Simper: [The Glue](https://cytomic.com/product/glue/), [The Drop](https://cytomic.com/product/drop/) & [The Scream](https://cytomic.com/product/scream/) Cytomic makes detailed & exactly accurate digital replications of analog hardware. Cytomic’s plugins are intuitive and fun to use and beautiful to look at. Most importantly, they sound astounding, as if you have the actual hardware in your computer, without maxing out your CPU. Trusted by musicians and producers all around the world, made in Australia. **Trial or buy today.** --- ### [Legal](https://cytomic.com/legal/) **Published:** November 4, 2021 **Author:** cytomicadmin **Content:** ## Who we are Cytomic is a partnership between husband and wife, Andrew and Emma Simper, who live in Perth, Western Australia. You can contact us by mail PO Box 284, North Fremantle WA 6159, via the [contact page](https://cytomic.com/contact/), via email at support@cytomic.com or through our socials (see footer). Cytomic’s Australian Business Number is: [ABN 58 013 929 310](https://abr.business.gov.au/ABN/View/58013929310) ## Copyright and Trademark The Cytomic logo & “Cytom” speaker character are trademarks of Cytomic ## ReCaptcha + Google This site is protected by reCAPTCHA and the Google [Privacy Policy](https://policies.google.com/privacy) and [Terms of Service](https://policies.google.com/terms) apply. ## End User License Agreement All downloads are subject to Cytomic’s [EULA](https://cytomic.com/wp-content/uploads/2016/08/Cytomic-License.pdf) ## Comments Comments are currently disabled on our webpage. If we decide to open a forum or comments section, this section of the privacy policy will be updated to reflect that change. ## Data Collected Cytomic collects various data from our customers in order to allow you to access and use our products safely, for us to provide customer support, and to abide by tax regulations. We will never expose or sell your data. Data collected includes: - Name - Email address - User name (as chosen by you) - Address - Country of residence - IP address - Dates and times of purchase, downloads, and authorisations - Cytomic Software Version number(s) This data is collected via our webpage via webform or when you enter information as part of your order, and it is stored securely. We have SSL certification for our webpage and two-factor authentication for access to our server. All financial information (e.g., bank details, card numbers, etc) is handled and stored by PayPal, and is never visible or stored by Cytomic or its employees. ## Cookies If you visit our login page, we will set a temporary cookie to determine if your browser accepts cookies. This cookie contains no personal data and is discarded when you close your browser. When you log in, we will also set up several cookies to save your login information and your screen display choices. Login cookies last for two days, and screen options cookies last for a year. If you select “Remember Me”, your login will persist for two weeks. If you log out of your account, the login cookies will be removed. ## Embedded content from other websites Articles on this site may include embedded content (e.g. videos, images, articles, etc.). Embedded content from other websites behaves in the exact same way as if the visitor has visited the other website. These websites may collect data about you, use cookies, embed additional third-party tracking, and monitor your interaction with that embedded content, including tracking your interaction with the embedded content if you have an account and are logged in to that website. ## Who we share your data with Cytomic will never share, sell or expose your data to anyone outside of Cytomic. For users that register on our website, we store the personal information provided in their user profile. All users can see their information, edit some fields and request changes to others which ware locked, at any time. Cytomic can also see and edit this information but no changes will be made without the individual specifically request. Any user can request complete deletion of their account at any time via email to support@cytomic. ## Data Retention and Your Rights Your data will be retained as long is as required for your use. If you have ceased contact with Cytomic, it will be retained for taxation or legal or customer service requirements and then removed as per requirements. If you have an account on this site, you can request to receive an exported file of the personal data we hold about you, including any data you have provided to us. You can also request that we erase any personal data we hold about you. This does not include any data we are obliged to keep for administrative, legal, or security purposes. ## Changes to Policy If Cytomic changes any part of this policy, this webpage will be updated to reflect the changes. This policy was last updated 9 October 2026. --- ### [Join our list](https://cytomic.com/contact/newsletter/) **Published:** August 18, 2026 **Author:** cytomicadmin **Content:** Sign up here to get Cytomic’s (about) once-a-month updates. We’ll let you know what we’ve been up to and what to look forward to – including updates on The Glue 2. We promise not to pester you or flood you with advertising. It would be great to see you on our socials, too, links at footer. PS. If you’re already a customer, you are probably signed up already – no need to sign up again. You can manage your preferences via your account portal. First Name (required) Last Name (required) Your email (required) ![Picture of Cytom, a yellow cartoon figure with a large speaker cone for his face, with cute little arms hanging by his sides and short legs. Cytom is the Cytomic mascot.](https://cytomic.com/wp-content/uploads/2026/05/cytom-icon-black-bg.png) --- ### [Unsubscribed](https://cytomic.com/contact/unsubscribed/) **Published:** February 8, 2025 **Author:** cytomicadmin **Content:** We are sorry to see you go, but you have now been unsubscribed as requested. If you wish your details to be completely removed from our database, contact support and your request will be actioned immediately. Made a mistake? Re-subscribe again via the newsletter, or if you are already a customer, please log in and you can resubscribe there. Thanks, Andy & Emma --- ### [Contact](https://cytomic.com/contact/) **Published:** December 11, 2023 **Author:** cytomicadmin **Content:** Your first name (required) Your last name (required) Your email (required) Enquiry type (required) General EnquirySupport EnquiryFeedbackPromo Your operating system AnyMacWinN/A For Support Enquiry: your DAW and its version Your message. Please share as much detail as you can! (required) --- ### [About](https://cytomic.com/about/) **Published:** December 30, 2021 **Author:** cytomicadmin **Content:** ## Who we are Andrew & Emma Simper founded Cytomic in London in 2007 and have been making world-class audio plugins ever since, helping tens of thousands of people to make their best music. Since 2010, we’ve lived in Fremantle, in Western Australia. Andrew’s technical knowledge has grown exponentially since he coded his first music software, right back in his uni days at UWA, where he completed a Maths and Computer Science double degree, while regularly playing guitar in a band. While working at FXpansion in London, he taught himself electronic engineering to really understand circuit modelling. Allied with his existing coding, graphic design & musical knowledge, he was ready to launch Cytomic. Emma and Andrew met in London in 2004. They married in 2008 and had their first child just one month before The Glue was released. Emma supports Andrew’s technical expertise with a range of administrative assistance for Cytomic, including finance, customer support, and marketing. She is also a sounding board for Andy’s development ideas, and loves when he is describing a problem to her and thereby comes up with the solution! Together they have two (now teenaged) children, but still try to get to gigs as often as they can. [![Head and shoulders portrait of a white man with short salt & pepper hair, wearing a tee-shirt, looking directly at the camera with a slight smile.](https://cytomic.com/wp-content/uploads/2023/05/andrew-portrait.jpg)](https://www.linkedin.com/in/andrew-simper/)**Andrew Simper** ![Head & shoulders portrait of white woman with curly brown hair wearing a black teeshirt and black glasses and a necklace.](https://cytomic.com/wp-content/uploads/2023/05/emma-portrait-1500x1500-1.jpg)**Emma Simper** ## Our Plugins Cytomic plugins create, change and enhance audio, and will help you to write and produce your best music. By accurately modelling the actual circuits from inside famous pieces of hardware, Cytomic digitally replicates their exact analogue sounds, [at every setting](https://www.youtube.com/watch?v=gWIvpXm4Ghc). Instead of carrying large, expensive, rare, heavy but fragile pieces of gear around, you can instead have all their gorgeous sounds right there, in your computer. And for a fraction of the cost! We use the same detailed, high quality algorithms used in circuit simulators, optimised to run fast, in real time, with low CPU. All Cytomic plugins feature fully scalable interfaces with clean, well-thought-out layouts, designed for musicians by a musician. Having a fantastic GUI, awesome sound and the best number crunching in the business helps, but a plugin also has to be fun to use and keep you in the creative flow. Cytomic takes great care to deliver meticulously crafted plugins that are intuitive to use. Our products stand the test of time and become essential tools, used by the world’s top musicians, priced to allow everyone access. [![](https://cytomic.com/wp-content/uploads/2025/10/glue-icon-text.png)](https://cytomic.com/product/glue/) [![](https://cytomic.com/wp-content/uploads/2025/10/drop-icon-text.png)](https://cytomic.com/product/drop/) [![](https://cytomic.com/wp-content/uploads/2025/10/scream-icon-text-1.png)](https://cytomic.com/product/scream/) ![](https://cytomic.com/wp-content/uploads/2022/02/cytomic-logo-bright-warm.svg) --- ### [Technical Papers](https://cytomic.com/technical-papers/) **Published:** October 2, 2011 **Author:** cytomicadmin **Excerpt:**

Below are some technical papers that will hopefully contribute some knowledge and algorithms to the DSP community in general.

**Content:** Below are some technical papers that will hopefully contribute some knowledge and algorithms to the DSP community in general. This knowledge is placed in the public domain, but if you find any of it useful then please feel free to email us and let us know! ## Non-linear Analog Modelling / Signal Processing ### From Circuit To Code: Under the Hood of Analog Modelling [adc-2020-andrew-simper-circuit-to-code-slides.pdf](/files/dsp/adc-2020-andrew-simper-circuit-to-code-slides.pdf) – Slides from talk given at the Audio Developer Conference 2020 <https://www.youtube.com/watch?v=eGcqomH6aAc> – Video of the talk given at the Audio Developer Conference 2020 ### Dynamic Smoothing [DynamicSmoothing.pdf](/files/dsp/DynamicSmoothing.pdf) – Two Pole State Variable Filter with self adjusting cutoff to musically smooth low bit depth and/or noisey control signals ## Linear Analog Modelling / Signal Processing ### Nyquist matched filters [matched-svf1-ivanstov.pdf](/files/dsp/matched-svf1-ivanstov.pdf) – One Pole Mixing SVF matched at Nyquist to analog prototype ### Trapezoidal integrated filters [OnePoleLinearLowPass.pdf](/files/dsp/OnePoleLinearLowPass.pdf) – One Pole Low Pass Filter [SvfLinearTrapOptimised2.pdf](/files/dsp/SvfLinearTrapOptimised2.pdf) – State Variable Filter [SkfLinearTrapOptimised2.pdf](/files/dsp/SkfLinearTrapOptimised2.pdf) – Sallen Key Low Pass Filter [SVF-vs-DF1.pdf](/files/dsp/SVF-vs-DF1.pdf) – Noise performance plots [Convert-TrapSVF-DF1.pdf](https://cytomic.com/files/dsp/Convert-TrapSVF-DF1.pdf) – Convert both ways between Trapezoidal SVF and DF1 coefficients [SvfLinearTrapAllOutputs.pdf](/files/dsp/SvfLinearTrapAllOutputs.pdf) – State Variable Filter Simultaneous computation of all outputs ### Sin only coefficient computation in state increment form for low noise and high accuracy [SvfLinearTrapezoidalSin.pdf](/files/dsp/SvfLinearTrapezoidalSin.pdf) – State Variable Filter with Sin only coefficient calculation [SkfLinearTrapezoidalSin.pdf](/files/dsp/SkfLinearTrapezoidalSin.pdf) – Sallen Key Filter with Sin only coefficient calculation ### Input mixing multimode filters – individual inputs for low, band, and high [SvfInputMixing.pdf](/files/dsp/SvfInputMixing.pdf) – State Variable Filter with Input mixing for low, band, and high [SkfInputMixing.pdf](/files/dsp/SkfInputMixing.pdf) – Sallen Key Filter with Input mixing for low, band, and high ### Matching of Forward Euler SVF to Trapezoidal SVF [SvfMatchingFeToTr.pdf](/files/dsp/SvfMatchingFeToTr.pdf) – Matching the linear time invariant frequency response of a Forward Euler integrated SVF to that of the Trapezoidal one --- ### [VCV Rack Modules](https://cytomic.com/vcv-rack-modules/) **Published:** July 7, 2023 **Author:** cytomicadmin **Content:** These modules are not regular plugins, but modules to load inside [VCV Rack](https://vcvrack.com). Once VCV Rack is installed you can run it standalone, or load it as a plugin inside any DAW. They can be purchased on the [VCV Rack Library](https://library.vcvrack.com/Cytomic/CF100) page. ![](https://cytomic.com/wp-content/uploads/2023/07/cf100-screenshot-446x1024.jpg)## CF100 [$15 – BUY NOW](https://library.vcvrack.com/Cytomic/CF100) The CF100 is a highly detailed analog model of the classic cascade filter found in the early Prophet synthesisers which used the SSM2040 filter chips. This model is based off the Discrete OTA schematic created by Jürgen Haible, with some extras added including multiple filters responses, and extra input and output saturation options. It runs without internal oversampling over the full range of frequencies. Oversampling can be optionally done using VCV Racks sample rate settings, and is recommended for patches where large amounts of drive or stronger sounding high frequency resonance is required. ### Input Controls: - DRIVE (0 to 10) – Exponential input gain amount from -inf dB up to +12 dB. Voltage controlled from the DRIVE CV input port. - FREQ (8hz to 30khz) – Exponential cutoff frequency of the filter. Can be controlled by the 1V/Oct, FM1, and FM2 CV input ports. - RES (0 to 10) – Linear resonance control, self oscillates at around 7.5. Voltage controlled from the RES CV input ports. - DRV Mod Depth (0 to 10 CV depth) - FM1 Mod Depth (0 to 10 CV depth) - FM2 Mod Depth (-5 to 5 CV depth) - RES Mod Depth (0 to 10 CV depth) ### Input Ports: - DRIVE (CV in) - FM1 (CV in) - 1V/OCT (CV in) - FM2 (CV in) - RES (CV in) - IN (audio in) ### Output Ports: - NPN2 (audio out) – twin 2 pole notch filter, with one notch an octave above the cutoff, and another an octave below. This response has lots of phase shift and sounds a bit like a phaser. - HP2 (audio out) – 2 pole high pass - BP4 (audio out) – 4 pole band pass, with a 2 pole high pass and two pole low pass both centred at the cutoff. - LP2 (audio out) – 2 pole low pass, with lots of character and drive - LP4 (audio out) – 4 pole low pass, with tamed and deeper character and drive ### Right click options: - Boost Input – Off, +6dB, and +12 dB. This changes the input level just like moving the DRIVE knob but allows for extra gain - Boost Output – Off, +6 dB, and +12 dB. This places gain between the output of each of the filters stages and an Op-Amp that clips to the voltage rails. Increase this for post filter distortion. - Circuit – AC JH, DC JH, DC Datasheet. The AC version is for audio, the DC versions can be used for either CV or Audio. The JH is the original CF100, and the Datasheet version is based on the schematic shown in the SSI2140 datasheet. - Noise Level – Off, Input Only, 50%, 100%, 150%, 200%. Analog modelled thermal hiss. 100% is true to the analog circuit. - PNP BF – 40, 400, 4k. Forward beta value of the PNP transistors used in the circuit. 40 gives more 2nd order harmonics, 400 is the default, and 4k reduces 2nd order harmonics. - Oversampling – Off, x2, x4. The oversampling multiplier to increase the sample rate used by the module internally, which reduces aliasing and gives stronger resonance - Knob LED Brightness – Off, 25%, 50%, 75%, 100% ### Credits: - User interface design: [Pyer](http://www.pyer.be) - Original JH circuit design: [Jürgen Haible](http://jhaible.com/legacy/tonline_stuff/jh2040.gif) - SSI2140 Datasheet circuit design: [Sound Semiconductor](https://www.soundsemiconductor.com/downloads/ssi2140datasheet.pdf) - Analog modelling, design input: Andrew Simper ### Audio Examples - [Filter Types Intro](/files/forums/cf100-filter-types-demo1.mp3)A sawtooth waveform being filter with various amounts of drive and resonance to show how the filter behaves. 0:00 – LP4 with different drive and resonance. 0:44 – LP2 with different drive and resonance. 1:20 – BP4 with different drive and resonance. 2:13 – HP2 with different drive and resonance. 3:11 – NPN2 with different drive and resonance. 4:45 – LP4 fade out. - [Stereo Bass and Arp](/files/forums/cf100-demo-final-ui.mp3)A basic song with a stereo bass and arp, with various filter sweeps and changes in drive and resonance. 0:00 – Bass using LP4. 0:28 – Arp using LP2. 1:06 – More melodic variation. 1:58 – Just Bass and Arp. - [Deep Bass Growl](/files/forums/cf100-base-deep-growl.mp3)A basic bassline with increasing amounts of drive being added. 0:00 – Low Drive. 0:29 – Medium Drive. 0:43 – High Drive. 1:00 – High Drive with Resonance. - [Pad Sin Wobble](/files/forums/cf100-pad-sin-wobble.mp3)A deep pad sounds is created with self oscillating resonance tuned to the same pitch as the oscillator. As the song progresses the cutoff of the filter is slightly changed to beat against the oscillator. 0:00 – Tuned resonance at the same pitch as the oscillator. 0:29 – Slightly detuned cutoff so it beats against the oscillator. 1:02 – More detuning of the cutoff. ## Change Log v2.0.0 (2023 Jul 7) – Initial release of the CF100 v2.0.1 (2023 Jul 11) – Increased resonance slightly, and added support for PNP BF (forward beta) customisation v2.0.2 (2023 Jul 13) – Calibrated the self oscillation tuning at 1000hz on the freq knob to 1000.00hz using a resonance of 7.5, PNP BF 400, sample rate of 44.1khz v2.0.3 (2023 Jul 14) – Added oversampling support via a right click menu: Off, x2, x4 v2.0.4 (2023 Jul 30) – Added a DC blocking toggle. Added detailed noise modelling. Added LEDs to knob dots. Fixed right click Initialize. v2.0.5 (2023 Jul 30) – Swapped the DC blocking toggle to a Circuit choice: AC JH, DC JH, DC Datasheet v2.0.6 (2023 Aug 19) – Working macOS arm64 build --- ### [Cookie Policy (AU)](https://cytomic.com/cookie-policy-au/) **Published:** August 4, 2023 **Author:** cytomicadmin **Content:** *This page was last changed on August 4, 2023, last checked on August 4, 2023 and applies to citizens of Australia.* ## 1. Introduction Our website, <https://cytomic.com> (hereinafter: “the website”) uses cookies and other related technologies (for convenience all technologies are referred to as “cookies”). Cookies are also placed by third parties we have engaged. In the document below we inform you about the use of cookies on our website. ## 2. What are cookies? A cookie is a small simple file that is sent along with pages of this website and stored by your browser on the hard drive of your computer or another device. 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Contact details For questions and/or comments about our Cookie Policy and this statement, please contact us by using the following contact details: Cytomic PO Box 284 North Fremantle WA 6159 Australia Website: <https://cytomic.com> Email: support@ex.comcytomic.com --- ### [Client Portal](https://cytomic.com/clients/) **Published:** July 22, 2023 **Author:** cytomicadmin **Content:** ## Welcome to your Client Portal Please login to your Client Portal to be able to view your documents Email Address Password Remember Me [Lost Password](https://cytomic.com/my-account/lost-password/) --- ### [Plug-ins](https://cytomic.com/plug-ins/) **Published:** December 24, 2021 **Author:** cytomicadmin --- ### [Shop](https://cytomic.com/shop/) **Published:** November 4, 2021 **Author:** cytomicadmin --- ## Landing Pages ### [Cytomic Landing Page](https://cytomic.com/elementor-landing-page-20073/) **Published:** December 20, 2021 **Author:** cytomicadmin **Content:** --- ## Products ### [The Glue](https://cytomic.com/product/glue/) **Published:** January 6, 2016 **Author:** cytomicadmin **Excerpt:** The Glue is an analog modelled compressor plug-in based on the classic 80's British big console buss compressor with some handy additional features. The compressor action is smooth and transparent as it uses the same high quality algorithms used in circuit simulators, but optimised to run fast. In addition to the regular compressor controls it has: Mix / Range / Sidechain High Pass knobs, External Sidechain support, Peak Clip, and Advanced Oversampling. **Content:** ## Classic VCA feed-back compressor The Glue is an analog modelled compressor plug-in based on The classic 80’s British big console stereo buss compressor. If used subtly on the main bus this produces gorgeously smooth and transparent compression that never goes out of style. When used heavily on a drum bus the classic “crack” of the attack portion of drums is produced, adding impact while controlling levels. The sidechain “detector” is a diode based envelope follower that “smooths out” the audio being sent to it. The detected amplitude of the sidechain input is used to to control the level of main signal, but is also sent to control the level of the input to the detector itself, in what is called a feed-back loop. This gives a different result to a feed-forward compressor, where the detector only changes the level of the main signal. ![Close-up of the g-bus circuit board with blue striped resistors, yellow capacitors, and white silkscreen labels showing component IDs like R58 and C31.](https://cytomic.com/wp-content/uploads/2026/05/gbus-circuit-board-1024x768.jpg) ## Dual Diode Envelope Follower Forming the core of the smooth behaviour of The Glue is an analog modelled dual diode envelope follower, which is solved using optimised nodal analysis. This results in a “soft maximum”, as the smoothed sum of both the left and right detected amplitude is used to control the stereo level. This is called “stereo linking”, and results in no change in the stereo image, as both left and right VCAs use the same detected voltage to set their gain amounts. In The Glue you can also vary how much the detectors are linked in 25% steps down to dual mono behaviour. Diodes are used as a way to smoothly switch between not attacking, and attacking, based on the level of the input signal level across the diodes. This means that very small input signals only result in slow attack times, and it’s not until there is a large signal that the diodes conduct fully and you get the final attack time. This smooth transition is important for transparent compression, but it goes one level deeper than this because of the feed-back structure of the compressor. ![Glue Dual Envelope Follower](https://cytomic.com/wp-content/uploads/2016/01/glue-env-flw-trim.svg) ## RMS and Peak Needles When compressing gently with The Glue you will mainly want to use the main white RMS Needle, but if you click on the VU Meter area to toggle viewing of the Peak Needle, which is yellow. This needle has a short hold time so you can make sure your makeup gain isn’t above the peak level you’re compressing. While hovering over the VU Meter you will also get a numeric RMS and Peak compression levels shown below the VU. ![The Glue RMS and Peak VU Meter](https://cytomic.com/wp-content/uploads/2026/05/glue-rms-peak-needles.jpg) ## Peak Clipper If you like to keep your peaks under control with a soft clipping waveshaper then The Glue has you covered. Enable to PEAKCLIP IN button and your peaks will be clipped away. This will cause aliasing if you apply the clipper too hard, but this can be reduced to inaudible levels by enabling oversampling. ![Plot of the Peak Clip Waveshaper](https://cytomic.com/wp-content/uploads/2026/05/glue-peak-clip.svg) ## Learn More Would you like to learn more about how to use The Glue in a production context? Have a look at this handy video by Mastering Explained. ## Range A new addition to the original circuit is the Range knob, which controls the maximum dynamic swing in changes of compression. The sidechain section of the circuit can easily be saturated with large input signals when the signal is clipped near the power supply voltage rails of the compressor. The main results in slewed attack times, because the top of the input signal being detected (not the main signal path!) is clipped away, so the detector is following a smaller signal. When set to full this control preserves the behaviour of the cleanest analog circuit, but the Range can be reduced slightly to emulate older units, or drastically for new creative control. The result is a useful alternative to parallel compression via the Mix knob. ![Range Knob](https://cytomic.com/wp-content/uploads/2026/05/glue-range-ui.jpg) ## Sidechain Highpass and Mix If you want to reduce compression pump due to loud low frequency components the built in soft -6 dB/Oct high pass filter can be used to filter the signal being detected to de-emphasise the low end. Another way to reduce the audible results of compression is to use the Mix knob, which cross fades the dry input signal with the compressed signal in a phase accurate manner. Much like a level control the units on the Mix knob are shown in decibels. ![Mix and High Pass Knobs](https://cytomic.com/wp-content/uploads/2026/05/glue-mix-hp-ui.jpg) **Product categories:** Plug-ins --- ### [The Scream](https://cytomic.com/product/scream/) **Published:** April 29, 2017 **Author:** cytomicadmin **Excerpt:** The Scream is a detailed discrete component model of the classic green TS808 "Tube Screamer" pedal. It has input and output class-A transistor buffers, Boyle macro modelled op-amps, and a selection of fully customisable clipping diodes. In fact every value of every component can be changed and randomised to customise your tone. Choose from a selection of diodes including silicon, germanium, or LEDs to create asymmetric clipping combinations, chain any number of diodes in series or even bypass them altogether and have a high gain boost that then clips the op-amp. **Content:** ## Interactive Schematic The Scream models the TS-808 precisely, right down to individual components, which you can see on the circuit schematic which pops out to the right by clicking the top right hand corner of the gui interface. Once the circuit is exposed you can adjust the components either manually, or by using the randomisation feature. [![Image showing The Scream Gui with the schematic circuit board popped out](https://cytomic.com/wp-content/uploads/2017/04/thescream-v1.2.15-screenshot-schematic-1024x638.png)](https://cytomic.com/wp-content/uploads/2017/04/thescream-v1.2.15-screenshot-schematic-1024x638.png) ## Randomisation The Randomisation “Rand” Panel allows you to assign new random values to every component, and parameter of the component, in the entire model, in stereo, which is a lot of fun to play with! To simulate having multiple pedals built during the same production run with slightly exaggerated manufacturing variation of component values it is recommend to use the following default settings: Mono 50% x1, Stereo 25% x1. If you hit the Randomise button, the current base values of all components get a random variation to them. When pressed again a new set of random variations is generated and added to the original base values. Keep generating variations to explore sounds you like, and move back and forth between iterations using the dots across the bottom of the GUI. ![](https://cytomic.com/wp-content/uploads/2026/05/thescream-rand-web-cutout.png) ## Mod Switch The Mod switch selects which circuit modification is active, Mod 1 or Mod 2. Each mod slot can contain an entirely new set of values for every component in the entire circuit model (in stereo), and switching between the two can be done on the fly or via DAW automation. Modifications to the circuit can be done using the Mods Panel, the Rand Panel, or the Schematic View. To edit a particular mod first select which one you want to edit with the Mod switch, then make your changes. Any changes you make do will automatically be stored over time in the undo bar which is shown in both the Mods and Rand panels. You can revert to previous changes using the dots. ![Extract from The Scream Gui showing the Quick Mods control panel](https://cytomic.com/wp-content/uploads/2026/05/thescream-mod-web-cutout-1024x583.png) ## Matching the hardware precisely Cytomic software **really** matches the hardware. Don’t believe us? Check out the video, or read the Sound on Sound review – just click on the SOS logo on the main image. **Product categories:** Plug-ins --- ### [The Drop](https://cytomic.com/product/drop/) **Published:** January 7, 2016 **Author:** cytomicadmin **Excerpt:** The Drop is an analog modelled resonant filter plug-in based on classic analog synth filters, as well as completely new designs. There is a huge level of detail in the models, which gives them amazing drive and tone, as well as smooth audio rate modulation behaviour. The original structure of the circuits is preserved in each model, as is the location and shape of all major non-linearities. **Content:** ## Eleven Filters in One Plugin Many classic synthesiser filter are on offer, but updated to run in stereo, all with Cytomic’s precision modelling. There are additional newly designed filter circuits by Cytomic, including high pass versions of many filters that originally only came in low pass. **MS1:** Korg MS20 rev 1 – BJT SKF Sallen Key Filter **MS2:** Korg MS20 rev2 – OTA SKF Sallen Key Filter **OSR:** Oxford Synthesizer Co. OSCar – SVF State Variable Filter **JRP:** Roland Jupiter 8 / Juno 6 – IR3109 OTA Cascade **SHR:** Roland SH101 / SH-09 – IR3109 OTA Cascade **PRD:** Moog Prodigy – BJT Ladder Cascade **WSP:** Wasp filter with self oscillation modifications – CMOS SVF **PT1:** Prophet 5 rev1 discrete OTA cascade filter. **SMP:** Andy’s own creation, half way between a Sallen Key and a SVF, with an OTA filter core and strong resonance tone **AMU:** a unique sounding transposed SVF as used in the Odyssey Mk1 **KSM:** a variation on the MS2 SKF but with stronger resonance. ![Moog Prodigy Circuit Board](https://cytomic.com/wp-content/uploads/2026/05/IMG_1499_43-1024x768.jpg) ## A Little Taste of Wobble Bass Check out the video Andy made showing how to make a wobble bass line using The Drop. Read The Drop’s five star review – click on the Computer Music badges on the main image. ## Envelopes and Envelope Followers The two analog modelled envelopes are based on the classic envelope circuit of the Moog Taurus, and offer a dynamic and smooth sound. They have been extended to allow triggering from different sources, and behave either as AHR envelopes, or more envelope followers for auto wah type effects. ![Drop Envelope Circuit](https://cytomic.com/wp-content/uploads/2026/05/env-flw-trim.svg) ## Filters and the Visualiser The Drop has both high and a low pass filters which can be run in High Detail or Medium Detail (HD / MD) modes, and in series or parallel. When driven, the filters growl in that distinctive and warm way analog filters behave. The input signal competes with the resonance to create detail and interest. Each of the filters will self oscilate with high resonance, but if this is not wanted the safe button can prevent this. The filter visualiser shows an accurate frequency response of the combined filtering done, and also shows the modulated position of both filters. It’s visible all the time underneath any of the modulation visualisers being shown. ![Drop Filter Visualiser](https://cytomic.com/wp-content/uploads/2016/01/drop-filter-visualiser-1024x768.jpg) **Product categories:** Plug-ins --- ## FAQs ### [Account Support](https://cytomic.com/faq/account-support/) **Published:** May 22, 2026 **Author:** cytomicadmin **Content:** ### How do I authorise my plugin(s)?+ If you are new to Cytomic, after payment, you will receive an email with your account details. Please log in to your account, where you will be prompted to change your password. Once successfully entered, you can navigate to My Account, then, Downloads and Licenses. You can download the correct version for your system from here, or from the plugin page. You may have already done this in order to run the trial. In your DAW of choice, load the plugin, and choose authorise instead of trial on the About box, enter your username and password and you are all good! If you wish to do a manual authorisation on- or off-line, please follow the instructions in the pop up. If the pop up does not appear, click on the name of the Plugin in the header bar. You are always welcome to contact us via the [contact](https://cytomic.com/contact/) page or email at support@cytomic.com if there are any problems. ### I purchased but can’t find my login?+ Sometimes the login email takes a few minutes to get through various security checks, or it may have gone to junk, Sometimes you may have had a typo when registering. Whatever the issue please contact us at <support@cytomic.com> or via the [contact](https://cytomic.com/contact/) form and we will be happy to help. ### I bought the wrong plugin by accident, help!+ Please don’t authorise, simply [contact ](https://cytomic.com/contact/)us straight away and we can swap it for the right one. Once the software is authorised, you may sell or keep it, but we cannot swap it or issue you a refund. ### Lost email or forgotten password? Or both!+ For forgotten passwords please reset here: <https://cytomic.com/my-account/lost-password/> If you’ve lost access to an old email or can’t remember your login details please contact support with your purchase email/order number/details etc and we’ll be happy to check for and reinstate your account for you – we have meticulous records of every order made. If you have an @qq.com email unfortunately, we cannot support your account. Please contact us using a difference email provider and we can change your account over. ### Refunds & returns + **Please trial our software before you buy**. You can check you are happy with it and that it is compatible with your system, before purchase. Downloading the trial is the first step in the purchase process, so there is nothing extra involved. Cytomic trial software has full sound quality and all features, the only limitations are that automation is not supported and you cannot save settings. No risk, no obligation, try it out! If you accidentally purchase the wrong product, **please do not authorise**, and contact us at support@cytomic.com straight away and we can swap it for you. **Once authorised, we cannot refund or exchange for a different product**. You may sell your software to a third party, however, please note software bought second hand cannot be on-sold. EU Directive 2023/2673 does not apply once the product has been authorised. Contact us at support@cytomic.com for questions related to refunds and returns. --- ### [Decisions](https://cytomic.com/faq/decisions/) **Published:** May 5, 2026 **Author:** cytomicadmin **Content:** ### Why should I buy Cytomic’s plugins?+ Uhhh, how about, because they’re bloody awesome?! Best sound +low CPU + reasonable priced = amazing music software. We are a small husband and wife team quietly making fab plugins. No venture capital, no big team, no massive marketing budget. Just Andrew Simper’s incredible DSP. Hear the difference, trial now to find what you’ve been missing. Cytomic products meticulously recreate famous pieces of analog hardware which we chose because, of course, they already sound great. By modeling every component, at every setting, we make software that sounds just as good. You can push our software just like you can the hardware and it will always give you the same warmth and tone, while not maxing out your CPU. Don’t believe us? Why not download our trial…? ### Can I try before I buy? What is your trial policy?+ Yes, you can trial our plugins. zero risk, zero obligation! Please download the appropriate trial version of the plugin(s you are interested in. The trial has full audio quality but does have some limits: - Automation is disabled, you have to use the graphical interface to edit the plugin settings - The about box will show every five minutes - You cannot save settings in songs - You cannot save presets to disk Downloading the current trial version is the first step in the purchase process. ### Cytomic The Glue, vs Ableton’s built in Glue…?+ Cytomic’s plugin, The Glue, was licensed by Ableton for use in their products from Live 9 and up. If you are a current Ableton Live user trying to decide if buying The Glue as a standalone plugin is worth it, here is a brief run-down of the differences between the two: Cytomic’s The Glue plugin and the Glue Compressor device in Ableton Live share most of the same core DSP, apart from the newly added stereo link feature. The plugin version can vary how much stereo linking is present from 100%, which is the default, all the way down to 0%, which behaves as a dual-mono compressor. The Ableton version is fixed at 100%. The other differences are external to the core DSP, and they are to do with sidechain filtering and oversampling. The Glue plugin supports up to x64 oversampling, with linear phase, intermediate phase, and minimum phase options, and you can automatically switch to a higher rate on render. The sidechain filter is a gentle 1 pole high pass, which is best for de-emphasis of bass. There is also an option to include DC blocking filters both pre- and post-compressor. The Glue Compressor device in Live supports up to x2 oversampling with linear phase (right click on title bar of the device to get the menu), and has a single filter section from EQ8 to do sidechain filtering. Both will give you great results, but the Cytomic version has the option for much higher oversampling, so if you’re pushing things, or want the highest quality possible on render, then the plugin version is still worth purchasing. The plugin version also means if you use a different DAW you are covered. We are proud to work with Ableton and you can read more about our partnership here (https://cytomic.com/ableton-and-cytomic/) ### Hardware vs “Analog-Modelled” Software+ There is a lot of discussion of whether hardware or software is better, and there are and always will be pros and cons to each, and fans of one or the other. Cytomic has chosen specific classic pieces of hardware to model because they have stood the test of time and are still loved and much used today. The term “analog modelling” is pretty broad, anything can be termed a model of something no matter how bad the model is. A straight line can be said to model a circle under certain conditions, but if you actually wanted a circle and were given a straight line you wouldn’t be happy! So we don’t blame you if you think analog modelling plugins are a load of BS, since some of the stuff you’ve tried probably was. Cytomic models circuits by preserving the location and connection of all the critical components in it. We use the same methods used in circuit simulators, but optimised to run fast. The continuous circuit equations are discretised using MNA (Modified Nodal Analysis) and then solved for using quasi Newton-Raphson iterations to converge on a solution. Equivalent circuits of groups of linear components are pre-computed to save CPU, along with a bunch of other optimisations so that the model can run hundreds of thousands of times per second. A normal circuit simulator can take 5 minutes or more to process one second of audio, our plugins do it in a fraction of a second otherwise your CPU would be maxed out! If you want to see the depth to which Andy goes to in his modelling, trial the The Scream, where you can pop out the virtual circuit board and play with the components, or read the Cytomic [technical papers](https://cytomic.com/technical-papers/). --- ### [Marketing](https://cytomic.com/faq/marketing/) **Published:** May 22, 2026 **Author:** cytomicadmin **Content:** ### Why so long between products? And why so few?+ Andy is a meticulous and perfectionist craftsman, all of which takes time but is hopefully reflected in the quality of Cytomic’s products, and their longevity. To balance the quality of audio against CPU is a slow built art form. There has been a lot of R&D that has gone into the current plugins, and we are just about ready to crank the wheel on that tech to put it into a bunch of exciting new products, all on a much faster timeline, and potentially building a team to assist with the GUI / framework / support fronts. However, we value **quality** over **quantity,** and all Cytomic products, now and in the future, will feature our precision digital replication of the coolest analog sounds. We are at the only company showing matching to the hardware at every setting with multiple inputs. That’s worth waiting for, don’t you think? Thanks, always, to our amazing customers, for your patience & support. ### Cross-promotions / Affiliate programme / Press+ We love to hear what our customers are doing with our products. Message via the “promo” tab on the [contact form](https://cytomic.com/contact/) or simply email at <support@cytomic.com> and connect with us via socials. Our affiliate programme is coming soon, please check back for further details. If you want to interview Andrew or discuss Cytomic products please contact us via socials, <support@cytomic.com> or via the webpage [contact form](https://cytomic.com/contact/). ### NFRs for reviews, and tutorials+ If you want to do a tutorial or educational video on our products, or a product review, we can help out with an NFR but with conditions, please email / contact via social to discuss. --- ### [Technical Support](https://cytomic.com/faq/technical-support/) **Published:** July 23, 2026 **Author:** cytomicadmin **Content:** ### General Issue or specific bug+ It can sound trite, but as with most software issues, if you are having difficulty, please ensure you have updated to the latest version, and try a reboot, to see if that helps. If that doesn’t work, please use the contact page to report your issue or bug, in as much detail as possible and we’ll get back to you asap. ### Permission Issues+ If you are having difficulty with permissions, here is how to fix them: == **Win** You can manually reset the permissions on the folder that stores the authorisation which can help. To do so please follow these steps: 1. open an elevated command prompt by pressing the Windows+ X key, then selecting “Windows PowerShell (Admin)” 2. run this command replacing the start of the path in quotes with your username and Documents folder name: `icacl`s "C:\\Users\\Your User Name\\Documents\\Cytomic" /reset /t /c /l == **macOS** Open a terminal and run the following commands, you can replace `whoami` with your username if you know what that is: `chown -R whoami ~/Music/Cytomic` `sudo chmod -R u+rw ~/Music/Cytomic` > 1. ### Legacy Versions+ If you would like a link to access to an older version of one of our plugins you can contact us via support, however please understand that for versions more than a year old, we cannot provide further support. ### Linux + Cytomic doesn’t currently support Linux. Current graphics issues are due to Wine not supporting Direct2D v1.3. Please contact Wine. --- ### [Pricing](https://cytomic.com/faq/pricing/) **Published:** May 22, 2026 **Author:** cytomicadmin **Content:** ### Do you ever have sales?+ Cytomic does not run temporary sales at particular times of year (like EOFY or Black Friday), but we do have a permanent discount offer and bundle deal. We do this for price stability and to remove any time pressure on your purchase. You never have to delay your purchase to wait for a sale – or get that yucky feeling of buying something and having it go on sale next week! **Most importantly, although we don’t have sales, we never have and never will charge for software updates or “update plans”, and we refuse to move to a subscription offer.** ### Do you offer discounts or have a bundle deal?+ Yes! If you have already purchased a plugin with us we offer a returning customer discount deal: after spending $99 at the Cytomic store, and still own the license(s), **you get 30% off all future purchases.** For example if you buy The Glue for $99 you can buy The Drop for $69 (or vice versa). Our Bundle deal is if you **purchase two or more plugins at once we offer a 15% discount off the order total**. All discounts are automatically applied at the checkout, but please make sure you are logged into your account before purchasing, otherwise we can’t check our records for what you’ve purchased already. ### Can I sell my license?+ Original licenses purchased directly Cytomic can be sold at our discretion once a USD29 transfer fee has been paid, please contact support before selling your license to anyone to double check it will be possible. Second-hand licenses cannot be on-sold further. Not For Retail (“NFR”) copies are non-transferable. --- ### [Security](https://cytomic.com/faq/security/) **Published:** May 22, 2026 **Author:** cytomicadmin **Content:** ### Is Cytomic safe?+ Yes! We have tens of thousands of customers and have been in operation since 2009. We take everyone’s privacy and security seriously. We will not sell or disclose your details. Downloads from our webpage are secure and virus-free. We use PayPal as our payment gateway. We require our users to create an account for copy protection and tax reasons. ### Which type of copy protection is used?+ Cytomic plugins use an authorisation file based copy protection system, we don’t use dongles or iLok. For computers connected to the internet you can authorise directly from within the plugin, your machine’s id will be sent securely to out website, and the authorisation file downloaded and placed in the correct folder to authorise that machine. For other computers you can download an authorisation file from your Cytomic account, once you have entered a machine ID, then either drag and drop this file onto the plugin, or manually copy the authorisation file to the correct folder. Once authorised on a machine the plugin will run indefinitely if no changes are made to that machine. Cytomic never “calls home” to check, the authorisation process only needs to be done once after installation or minor version updates. ### How many authorisations do I get?+ Each license can run on up to two computers simultaneously, and allows for three authorisations per year to cover computer updates. It is easy to occasionally request an extra one if you need more, just let support know the circumstances. If you need to regularly authorise on more than two computers at once we recommend buying a second license, remember to log in to your account prior to purchase to obtain any [customer discount](https://cytomic.com/faq/pricing/) you may have earned. We prefer this to any dongle based security which sometimes have their own issues. ### What about Cracks?+ Cracks suck. Some people will always want to use them. We try to limit piracy with thanks to Tracksaur. <https://tracksaur.com/>. We use copy protection that doesn’t suck for you, our users. There is a trial version for each of our products with very few limitations which everyone can use. ### Can I buy Cytomic from anywhere else?+ **No, this website is the only place to buy new Cytomic plugins.** If you’re paying elsewhere, you’re paying for a crack. Please don’t! Thanks to all our lovely customers past, present, and future, who do the right thing. --- ## Testimonials ### [Hear why everyone is raving about it!](https://cytomic.com/testimonial/31389/) **Published:** July 25, 2026 **Author:** cytomicadmin **Content:** I’ve never been an advocate of expensive outboard gear, but I never found a software compressor that had the ‘magic’ of outboard buss compressors… until I got The Glue. The difference between it and the typical software compressor is not subtle – it clamps and tames your signals without any of that transient coloration, or sterile clamping found on most software compressors. Don’t let the low price fool you, if you give it a test-drive I’m pretty sure you’ll hear why everyone is raving about it! --- ### [I heart The Glue](https://cytomic.com/testimonial/i-heart-the-glue/) **Published:** July 19, 2026 **Author:** cytomicadmin **Content:** I heart the glue… finally, a compressor with the short attack times i’ve always wanted plus side chainy goodness to deliver the meat to my productions that my butcher cannot…. Cytomic does no wrong here! --- ### [This vst is hot!](https://cytomic.com/testimonial/this-vst-is-hot/) **Published:** July 25, 2026 **Author:** cytomicadmin **Content:** I’m in a mix right now and using The Glue. This vst is hot!!!! The Glue is a must have in my set up, it is simply on every track i’ve done so far since i have it. As a master, or sidechain, it’s simply wonderfull, punchy or smooth. I come from a 100% hardware environment, and so it took me a while to find a good alternative --- ### [I don't know how you're doing this but congratulations](https://cytomic.com/testimonial/im-proud-to-be-on-your-website/) **Published:** July 19, 2026 **Author:** cytomicadmin **Content:** You won’t see my name associated with many products but I’m proud to be on your website. The features and purity of sound of The Glue show a deep understanding of how compressors work. Your mix control invites experimentation with parallel compression and your range control allows the Glue to grab the sound early without over compressing. The Glue not only moves more like analogue compressors but most surprisingly it also has a nice ‘tone’ which is always a characteristic of different analogue boxes but missing on other plugins I’ve tried. I don’t know how you’re doing this but congratulations and thank you. --- ### [The Drop is arguably the finest filter plugin ever made](https://cytomic.com/testimonial/the-drop-is-arguably-the-finest-filter-plugin-ever-made/) **Published:** January 7, 2016 **Author:** cytomicadmin **Excerpt:**

“The Drop is packed with powerful, fun and genuinely useful features, making it a fantastic plugin for anyone who uses filters creatively. Crucially, no matter how deep you choose to go with it, it always sounds absolutely superb.”

**Content:** Now that the finished version is finally here, we’re happy to report that it’s turned out every bit as special as we hoped and expected it to. Indeed, The Drop is arguably the finest filter plugin ever made, with a superlative sound and extensive feature set. The Drop is packed with powerful, fun and genuinely useful features, making it a fantastic plugin for anyone who uses filters creatively. Crucially, no matter how deep you choose to go with it, it always sounds absolutely superb. --- ### [A ‘more of everything’ compressor](https://cytomic.com/testimonial/a-more-of-everything-compressor/) **Published:** January 7, 2016 **Author:** cytomicadmin **Excerpt:**

“The Glue is based on the legendary SSL bus compressor and makes a mighty fine job of performing transparent bus compression. Compared to similar plug‑ins, it's more transparent but without sounding flat or boring. It's kind of a 'more of everything' compressor, and at a great price too!”

**Content:** The Glue is based on the legendary SSL bus compressor and makes a mighty fine job of performing transparent bus compression. Compared to similar plug‑ins, it’s more transparent but without sounding flat or boring. It’s kind of a ‘more of everything’ compressor, and at a great price too! It not only performed impeccably on bus‑compression duties, but was also able to tighten up bass guitar, acoustic guitar, drums and vocals without adding a ‘sound’. --- ### [The Glue is a world-class plug-in](https://cytomic.com/testimonial/glue-world-class-plug/) **Published:** August 2, 2016 **Author:** cytomicadmin **Excerpt:**

“Both the Mix and Range controls add a host of options for dialling in the compression flavour, and in practice we found this made The Glue an incredibly flexible compressor suitable not just for use on the master bus, but for individual instruments too. The Glue is a world-class plug-in and we reckon it offers amazing value.”

**Content:** The Glue is a world-class plug-in and we reckon it offers amazing value. Factor in the extra options and you have a very tidy and useful compressor with more real-world uses than the design it’s based on. Both the Mix and Range controls add a host of options for dialling in the compression flavour, and in practice we found this made The Glue an incredibly flexible compressor suitable not just for use on the master bus, but for individual instruments too. --- ### [The Drop is pure magic, get it now](https://cytomic.com/testimonial/drop-pure-magic-get-it-now/) **Published:** August 2, 2016 **Author:** cytomicadmin **Excerpt:**

“The Drop is a success on so many levels, it’s a little mind-boggling that it’s priced under $100. As an emulation of analog filters The Drop is a stunning achievement. The Drop is pure magic and I’ll be using it daily for the foreseeable future. Get it now.”

**Content:** The Drop is a success on so many levels, it’s a little mind-boggling that it’s priced under $100. As an emulation of analog filters The Drop is a stunning achievement. It’s hard to overstate just how accurate these models really are. That The Drop actually models the circuits down to the transistors means that its sound is 99 percent identical to the real thing—and as someone with a studio full of the real thing, I’m not exaggerating. The Drop is pure magic and I’ll be using it daily for the foreseeable future. Get it now. --- ### [A Tweaker's Delight](https://cytomic.com/testimonial/a-tweakers-delight/) **Published:** May 8, 2026 **Author:** cytomicadmin **Content:** This is so much more than a detailed plug‑in version of the beloved Tube Screamer. Not only has it been modelled in fastidious detail, but you can tweak to your heart’s content and really dig into the fine detail of circuitry design — with no risk of burning out any chips! --- ## Categories ### [News](https://cytomic.com/category/news/) **Description:** Announcements and other news. --- ### [Notes](https://cytomic.com/category/notes/) **Description:** General musings, observations, and insights into ITB production and analog modelling. --- ## Tags ### [Analog Modelling](https://cytomic.com/tag/analog-modelling/) --- ### [Phaser](https://cytomic.com/tag/phaser/) --- ### [Phase 90](https://cytomic.com/tag/phase-90/) --- ### [MXR](https://cytomic.com/tag/mxr/) --- ### [LiveSpice](https://cytomic.com/tag/livespice/) --- ### [Blackmer](https://cytomic.com/tag/blackmer/) --- ### [CCS](https://cytomic.com/tag/ccs/) --- ### [The Glue](https://cytomic.com/tag/the-glue/) --- ### [LTSpice](https://cytomic.com/tag/ltspice/) --- ### [VCA](https://cytomic.com/tag/vca/) --- ### [Tube Screamer](https://cytomic.com/tag/tube-screamer/) --- ### [DSP](https://cytomic.com/tag/dsp/) --- ### [Ibanez](https://cytomic.com/tag/ibanez/) --- ### [TS-808](https://cytomic.com/tag/ts-808/) --- ### [Prophet](https://cytomic.com/tag/prophet/) --- ## Product categories ### [Plug-ins](https://cytomic.com/product-category/plug-ins/) --- ## News categories ### [PRODUCTS NEWS](https://cytomic.com/newscategory/products-news/) --- ### [MEDIA](https://cytomic.com/newscategory/media/) --- ### [COMPANY NEWS](https://cytomic.com/newscategory/company-news/) --- ### [AWARDS](https://cytomic.com/newscategory/awards/) ---