Cherry Audio Forums

Dumb question for y’all. What would be the best way to simulate the feedback parameter from the miniverse synth in the module collection? Is it as simple as taking the mixer output and feeding it back into itself? I tried doing that but it doesn’t sound right.

The problem with setting up a feedback path in Voltage Modular is that each module introduces 1 sample period of delay. So if you have this configuration:

Oscs & Amplifier Output Feedback -> Mixer -> Filter -> Amplifier

The mixer itself introduces 1 sample delay.
The Filter introduces 1 sample delay.
The Amplifier introduces 1 sample delay.

3 sample delays at 48 kHz sample rate means a delay period of 1/16,000 second.
Increasing the feedback will create a resonant comb filter @ 16 kHz, hence the weird sound.

Ah…that makes sense. I wonder if it’s even possible to compensate for this due to the nature of modular routing. Like if you wanted to create a parameter to compensate for the delay, it would result in a delay for the entire module, so any input and output would be affected by it. Or is that something that could actually be compensated for?

I certainly haven't found a way to get round this limitation. I encountered it when trying to build a phaser with multiple all-pass filters. When you try to route the phase-shifted signal back to the input of the first filter for feedback, you can't avoid introducing a significant time delay, which causes comb filtering.

Do you know if the other modular synth plugins have this same delay issue?

Hopefully CA or Mark have a way to allow modules to compensate for it.