[sdiy] Synth pitch envelope

[Michael E Caloroso]

All subjective.  Control laws are driven by your ears.

VCA inputs can be linear or exponential too.  Mixing shapes between
EGs and VCAs is an empirical process.  Some work best for audio,
others best for modulation.

A good example is a trick I use for brass patches.  I like to inject a
little EG into the pitch on one of the two VCOs for a nice fat
transient on the attack.  It works on my Oberheims and Andromeda, but
it doesn't sound right on my Memorymoog.  The difference is the
control law  of the modulation VCA.

MC

On 2/12/16, Roman Sowa <modular at go2.pl> wrote:
> There is no correct shape for envelope on a synth. The player decides
> what is correct and uses what he/she likes. Any kind of pitch modulation
> is fine to me, as long at some point a tune can be distinguished. I'm
> not even touching the blip-blop type of music mostly made with modulars
> on youtube.
>
> As far ADSR goes, the only correctness I can notice is to normalize
> Sustain level to 0, so tune during sustain is the same as without EG
> modulation. This way it can start from lower or upper pitch, and go
> there again on release. Best if ADSR can be bipolar, or rest/release
> level can be adjusted independently of attack level.
>
> Roman
>
> W dniu 2016-02-11 o 14:56, Richie Burnett pisze:
>> Incidentally is there any feeling on what is the correct shape for a
>> pitch envelope generator on a synth?  I notice that not many synths have
>> this functionality, and those that do, just seem to have an AD rather
>> than full ADSR.  I suppose there isn't much demand for "sustaining" at a
>> detuned pitch!?  Obviously a bi-polar envelope depth control is needed
>> to allow pitch modulation either up or down, but was wondering if linear
>> attack and decay are the norm, or if expo curves predominate here?  Or
>> is it a case of anything goes...
>>
>> -Richie,
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