Spin Semiconductor

Hi everyone,

I’m fairly new to FV-1 programming and I’m trying to understand something about delay algorithms.

Whenever I change the delay time on the FV-1 while audio is running, I always get the typical pitch glide / pitch shift caused by the read pointer moving. I’ve been searching around but couldn’t find a clear explanation or an example showing how to avoid it.

My question is:
Is there any reliable method to implement a delay on the FV-1 that does not produce pitch modulation when the delay time is changed?

If anyone has done this before, or knows whether it’s possible within the FV-1’s limitations, I’d really appreciate any tips, references, or code examples.

You could wait to change the pointer until after the user stops moving it then jump to the new point but you will hear a discontinuity in the sound and the user will feel a delay in changes. So comes down to do you want to hear pitch shifting or glitches?

You can detect changes in the delay time pot and use this to fade up/down two separate pointers. You have to have some sort of limit/hysteresis so that you are not changing the tap point of the delay while it is faded up. I don't have any examples, it's pretty complicated, but I have seen it done.

DL