MATRIXSYNTH: Roland 100m 175 Triple Vactrol Filter

Monday, September 24, 2007

Roland 100m 175 Triple Vactrol Filter

via Ryk:
"The module has three separate Bandpass Filters controlled by Vactrols, based partially on the famous Korg PS3100 resonator circuit, with additional individual resonance circuits and mix section.

They are internally patched in parallel with linked audio inputs, and mod buses, to act as a traditional resonater type filter setup.
When jacks are inserted into the audio inputs and mod inputs they break the routing and the filters can be used separately with individual inputs, freq. modulation, and individual resonance controls.

The same is true of the outputs, where they are internally patched to be mixed to one output via individual level faders, or routed to separate outs, by inserting a jack in the relevant output socket."

more images

Update: Samples

Random atonal Vactrol thumps and twang sounds

Chords with stereo filter sweeps

175 Filter twang arpeggio sequence, with slow 175 Filter sweeps

Various vocal formant sounds


  1. beautyfull job

  2. Yes awesome job! I would love to have one for my 100m.

  3. beautiful work.. i hear these vactrol things are really going to take off one day

  4. Wonder how close the MOTM-410 vactrol triple resonator sounds to this. I want one in a 1U rack mount FX box.


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