[sdiy] Synth pitch envelope

[rsdio at audiobanshee.com]

Yes, linear CV to V/Oct produces an exponential pitch change, but we hear that as a linear change. Similar to the concerns about the sustain part of a linear ADSR into a log VCA, a linear pitch envelope would produce a constant pitch change that suddenly stops at the sustain, and again at the end of release.

Patch developers might want the option of having the pitch change be perceived as slowing down as it approaches the steady state, rather than abruptly stopping. In that case, you'll want a RC simulation, a.k.a. low-pass, for an asymptotic approach to the final frequency. Then again, maybe it would also be beneficial to have the pitch change start slowly and build up to faster pitch changes in the middle before slowing down at the end, which would mean an exponential attach - but perhaps the opposite of what would be easily implemented.

Brian

On Feb 11, 2016, at 6:30 AM, Michael Zacherl <sdiy-mz01 at blauwurf.info> wrote:
> if the env goes to a regular CV-in (V/Oct) then that’s already exponential.
>