At it’s most basic.
A transient is sent to a filter input with resonance and makes a non-sustained yet pitched tone.
Same principle but instead of a controlling the frequency of a continuously oscillating filter, you excite the filter with a transient for a percussive sound (so you need to coax the filter to oscillate on each key press). This is particularly nice to play with a keyboard when pinging a filter with a repeating transient because holding down the keys allows one to play clusters of percussive sounds rather than a typical chord drone. I’ve been able to replicate this on the Prophet 5 / 6 / 10’s I’ve played because they allow LFOs to be sent through the audio path of the filter, but transients can be synthesized in a variety of ways.
Just curious if the digital implementation of the Peak’s oscillators allows for this type of synthesis.
My immediate hunch would be to key sync a sawtooth wave with an incredibly fast mod envelope > oscillator mix amount so you can get a single click on each key press, then use a high sustain / release value on the VCA envelope and engage key tracking to the filter to make the sound audible / playable. Maybe loop the envelope for the clusters I was referring to.