thanks. i just need a simple high pass, without resonance. just one knob to control the frequency.
i want it in the envelope follower, because i like putting drum machines into envelope followers and then taking the generated envelope into the pitch of an oscillator.
so basically the drum machine generates a melody.
if you add a high pass filter before the envelope out, you can control the melody in a strange way.
i do it with my ms20 mini a lot:
at 0:34 i turn up the high pass filter of the ms20s envelope follower the first time.
the patch was opz into the external signal processor and then the generated envelope cv routed to oscillator 2.