In addition, a very important aspect of the CEM3310 - Prophet-5 envelopes is that little "attack hold time on max level" after the actual attack time has reached max level. This is part of what makes the Prophet-5rev3 have that thump/click/acoustic response. The same happens on a Minimoog, the max level at attack is being held even longer and that makes for that unique punch and impact in Minimoog sounds. So, a new "Attack Hold Time" parameter with control from 0 to a few miliseconds would bring great benefit to the envelope sound.
Edit:
What I´m talking about from listening could also just be some kind of "decay hold" due to an overshoot and limiting of the control voltage at the decay stage. Whatever it is it makes for that bump/punch and is one significant reason why digital envelopes almost never reach the impact of fast analogue envelopes.
Edit2:
For example - to achieve a similar attack on the P600 I need to reduce Amp Env Sustain to about 50-70 % and set Amp Env Decay to about 1.2. On a Prophet-5 - Repro-5 this little bump is built into the Amp envelope, even for simple "only amp sustain up" sounds. Adding the filter env then adds even more thump/click. With perfect digital envelopes this effect is not there unless it´s being taken into account in envelope designing/coding.
image-et-son
commented
2 years ago
In addition, a very important aspect of the CEM3310 - Prophet-5 envelopes is that little "attack hold time on max level" after the actual attack time has reached max level. This is part of what makes the Prophet-5rev3 have that thump/click/acoustic response. The same happens on a Minimoog, the max level at attack is being held even longer and that makes for that unique punch and impact in Minimoog sounds. So, a new "Attack Hold Time" parameter with control from 0 to a few miliseconds would bring great benefit to the envelope sound.
Edit: What I´m talking about from listening could also just be some kind of "decay hold" due to an overshoot and limiting of the control voltage at the decay stage. Whatever it is it makes for that bump/punch and is one significant reason why digital envelopes almost never reach the impact of fast analogue envelopes.
Edit2: For example - to achieve a similar attack on the P600 I need to reduce Amp Env Sustain to about 50-70 % and set Amp Env Decay to about 1.2. On a Prophet-5 - Repro-5 this little bump is built into the Amp envelope, even for simple "only amp sustain up" sounds. Adding the filter env then adds even more thump/click. With perfect digital envelopes this effect is not there unless it´s being taken into account in envelope designing/coding.
Originally posted by @el-folie in https://github.com/image-et-son/p600fw/issues/64#issuecomment-1007381491