TwoNineFive (295) 10-channel comb filter
This is a 10-channel band filter based on the MMI Modular 10-channel comb filter, which is the eurorack version of the Buchla model 295. I had been thinking of buying the pcb and eventually completing the DIY version of the eurorack module, but I got inspired by the 16 band graphic equalizer and the Ten Band Resonant Equalizer Audulus modules put together by @stschoen and thought to try my hand at making my own version in Audulus. Using the equalizers created by @stschoen as a starting template and getting some great tips along the way, I’m very happy with the end result. Input audio is on the left side and the left knob controls can be used to mix in the levels of each bandpass frequency. The mix knobs only affect the summed output to the top right. Same with the “dB gain” knob. The “width” knob affects all bandpass frequencies as well as the Q of the LPF and the HPF on individual outputs as well as summed. The individual bandpass frequency outputs are unattenuated and unaffected by the individual mix knobs and dB gain knob. I also included breakout modules (“pocket comb” versions) for just the individual unattenuated bandpass channels, only width control, as well as a version only focused on the summed output signal. Many thanks to @stschoen and @biminiroad for the help!
TwoNineFive (295) 10-Channel Comb Filter final (3 versions).audulus (648.4 KB)
Buchla 295 demo.audulus (2.1 MB)
I/O
| Input | Signal Range | Notes |
|---|
| Audio signal input
Output | Signal Range | Notes
- Audio Output with effect
- Unattenuated outputs for each band frequency
Controls
|
bandwidth/Q control
dB gain over sum output
—|:—:|—
|
individual frequency band control for each channel (affects "sum" output only)
Displays
- amount of individual band controls affecting mix at summed output
- dB gain amount on summed output
But the LEDs were a nice touch for that!
