Cytomic announces "The Drop" resonant filter plugin

There has been lots of interest in Cytomic's second product and we are proud to announce it will be an analog modelled resonant filter plugin. It is still in construction but we'll post audio demos and news until the final release.

Here's a quick rundown of the feature set so far:

  • Dual filter section with a Highpass into Lowpass
  • Circuits include Sallen Key (eg MS-20), Ladder (eg Moog Prodigy), Cascade (eg Roland SH-02) and more to be announced
  • Stereo and Mono processing with either 2 or 4 poles
  • Loads of drive and character and analog style noise
  • Full frequency range and perfect resonance tracking without oversampling so there is no latency in processing
  • Huge amounts of resonance if you want and also "safe resonance" button for DJ use to make sure you don't rip people's ears off in a club situation
  • A powerful morphing LFO capable of audio rate stereo modulation
  • Two AHR envelopes (analog modelled) that double as envelope followers, one for the cutoff and one for amplitude
  • FM from main audio input or sidechain audio input

One Sided Tranny

A high and low pass transistor core Sallen Key filter (eg MS-20 rev1) is put through its paces on a sawtooth bassline which builds into a pad and then beat. The high pass filter in this example is a new circuit design to achieve 2 poles of high pass filtering as the original circuit was only 1 pole, which isn't enough for most uses. Drums are from the Goldbaby Urban Cookbook and from MicroTonic, the pad sound is from Synplant, and the sawtooth bassline is from a Cytomic test oscillator.

Morphing LFO

This example puts the smoothly morphing LFO through its paces. The LFO can be synced to BPM, and automatically retriggered, so you can smoothly alter the rate but still stay in time with your music. The shape can morph between triangle, to saw up and saw down, and an exponential curve amount which can make the LFO sound like an envelope or square wave. There is also a swing parameter and stereo offset, and best of all is you can tweak them all the parameters in real time in very musical and expressive ways. This example was generated at 44.1kHz with no oversampling.

Transistor SKF Sweeps

This is the first set of examples of the just finished discrete transistor core Sallen Key filter, which is the same structure used in the MS20 rev1 filter. The resonance is set to just over self osc, then a saw input is increased in volume to saturate the filter, then the same thing done again but with the resonance way up high.

Envelope Drums

Driven Drums

The lowpass and highpass filters are swept around on a drum loop. The first example is "clean" and uses the envelope follower at the end to beef up the funkiness. The second example increases the drive gradually and sweeps the filters around, as you can hear once the filters are swept out of band the signal is completely clean again.

Saw FM 1

Saw FM 2

Saw FM 3

Now this example is done as a worst case senario, screaming self oscillation with huge amounts of FM and no oversampling - yep, these examples were generated at 44.1 kHz, and things will only sound better if you oversample from there. All examples use the Sallen Key OTA model. The input signal is a raw unfiltered saw waveform from a Korg Monotron. The first example has high resonance, the second has huge resonance way up into self oscillation, and the third has huge resonance but slightly less drive. The FM source for the first two examples is actually another copy of The Drop in self oscillation as well, and the third example uses the saw wave output of another Korg Monotron.

Bass Plop

Output Drive

These two examples use the Cascade OTA filter circuit. The first one has features the envelope follower running off the audio input in a silly bassline with the resonance just below self oscillation. The second example is an 808 drum loop, courtesy of fine sample purveyors Goldbaby with loads of output drive.

Saw Sweep 1

Saw Sweep 2

Saw Sweep 3

It is a little boring I know, but for those filter aficionados out there this will give you a good taste of the resonance and drive characteristics. In this example I switch between the following modes in order: State Variable OTA, State Variable Diode, Sallen Key OTA, Sallen Key Diode. The raw unfiltered saw waveform used as input is from a Korg Monotron. Each version has a different fixed resonance and drive setting.