This is another one of my “I don’t have a clue what I’m doing” threads, but since they usually turn into interesting discussions, and possibly a usable unit at the end here it goes.
I’m trying to make a “scratch” effect unit for playing back long samples (beats, songs, loops) and messing with the playhead in realtime. The most logical candidate for the purpose in my head is the sample scanner, but I haven’t done too much with this unit and my experiments didn’t yield satisfying results to develop further. So I’m wondering: is the sample scanner indeed the best candidate for the job or do I need a non-existing feature on the sample players? While trying to achieve this effect with the sample scanner these were some problems I encountered:
- Playing back different samples with different length at speed:1 is the biggest challenge I believe. I tried to achieve a “normal” sample playback with a saw wave modulation of the “center” parameter, but it seems the exact gain and frequency settings will always be relative to the sample length, thus very impractical for regular playback. Is that correct?
- Even if normal playback is somehow achieved, I’m at a loss at how to take control of the playhead at the exact point where it is currently playing with another modulation and make it go back or forward just a bit to “scratch” the sample, and then continuing playing the sample.
- I have been able to achieve a scratch-like effect by manually moving the center parameter around but:
- Connecting the center parameter to an offset from my modular appears to receive a constant stream of tiny voltages making the playhead jitter and produce a lot of unwanted noise. I could make this effect stop by putting a LPF after the incoming CV but this also changes the signal quite a bit so I’m not sure what the best way to go about this is.
That’s where I’m at so far. If anyone has ideas on this, shoot
EDIT: preset download, demo and full info here Itchy! sample scratching preset