[sdiy] MIDI Velocity on analog synths
martin at martinfay.com
Fri Feb 7 08:28:51 CET 2014
At Note Off the pitch CV may need to "revert" to another held note
depending on the note priority scheme, in this case I've not reverted
PS yes, I was driving the Pro One with a Kenton Pro-2.
Sent from my iPhone
On 7 Feb 2014, at 06:01, rsdio at sounds.wa.com wrote:
> I could be overlooking some detail, but I would say that every
> voltage except Gate should be held until the next update (and fore
> Velocity, that update comes with Note On).
> I mean, envelope control voltages should progress according to their
> rate and level settings, frequency should be updated at Note On and
> held steady until a new note, and all other CV values should pretty
> much stay put until specifically updated. The Gate signal is the
> only analog thing that should change at Note Off, besides Note Off
> Velocity. Of course, envelopes will response to Gate Off by
> beginning their release, but envelope outputs are always under their
> own control.
> Those of you with more modular experience than me (or even non-
> modular analog CV systems) are welcome to enlighten the readers if
> there's something wrong or something I've missed.
> ... or, to put it another way, what is a voltage supposed to change
> to when a note ends? There is no defined value other than the most
> recent value. What do analog sequencers do with the voltage between
> steps? I've always assumed that they hold the previous value until a
> new update occurs, rather than dropping back to 0 V, but I guess
> that's a potential implementation.
> Brian Willoughby
> Sound Consulting
> On Feb 6, 2014, at 21:35, Quincas Moreira wrote:
>> I have Roman's midi implant, and it has a nifty feature. You can
>> program it with sys.ex. to hold the voltage in cv 2 (which i use
>> for velocity) until the next note-on message. This is useful for
>> when you have a sound with long decay, so you don't get a jump in
>> the velocity value when you let go of the key.
>> On Thu, Feb 6, 2014 at 9:35 PM, <rsdio at sounds.wa.com> wrote:
>>> I was going to ask how you assigned velocity to anything with a
>>> stock Pro-One, but I suppose you used a MIDI-to-CV converter.
>>> On Feb 6, 2014, at 06:14, Martin Fay wrote:
>>>> As a countering point, when I had a Pro-One I used velocity to
>>>> control cutoff, so certainly _I_ found that musically useful ;)
>>>> On 6 Feb 2014, at 09:17, Florian Anwander <fanwander at mnet-
>>>> online.de> wrote:
>>>>> Am 05.02.2014 19:11, schrieb MTG:
>>>>>> I imagine when an Note-On arrives you
>>>>>> apply the velocity value (voltage) to VCF Cutoff or Resonance or
>>>>> Just aside the 0V question: I'd never direct the velocity to the
>>>>> cutoff only, but always to the amounts of the envelopes.
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