setting VCO via MIDI

[Roel Das]

I've been thinking about this too. (See the page on my midi CV at
www.geocities.com/roelrules/ ,yes, yes, you already know that.)

In the kenton midi cv's and the encore expressionist,  this is implemented
with different trigger modes. (single/multpile) In single, the trigger will
not re-trigger if a new overlapping note is played, that is, if a note on is
received before a note off message for the previous note. Multiple always
retriggers when a new note on message is received.

Philip Rees (little MCV) does somewhat the same, but without fancy user
interfacing. Default is multiple and switching the modes is possible by
sending a legato footswitch midi message. (controller number 68, or in hex
44. With value <63=off, >64=on)

I'm thinking of doing both. :-)
Setting a default, AND allowing switching...

Or you could just use pitch bend, and adjust the range to suit your play...
(maybe with sysEx)

Roel


----- Oorspronkelijk bericht -----
Van: "Trevor Page" <trevor at resonance.fsnet.co.uk>
Aan: <synth-diy at mailhost.bpa.nl>
Verzonden: woensdag 16 februari 2000 14:04
Onderwerp: setting VCO via MIDI


> Hi there,
>
> Can anyone tell me if there is a MIDI controller number reserved (or used)
> for altering the VCO pitch? I know this may sound a strange question- this
> is of course something you would do with a note-on message. However, I
need
> to be able to set the VCO to a new pitch without triggering the gate.
>
> The whole idea behind this is so that my sequencer project will be able to
> set my TB3030's pitch without triggering a new note. In the original 303,
> the VCO tracks the pitch setting for each 16th step regardless of whether
> it's a note or rest. It is possible to set the slide on a rest, and
> therefore it's possible to have a note sliding from another note that is
not
> actually sounding. You could not do this via MIDI. It occurs to me that it
> is therefore not actually possible to fully replicate certain 303
sequences
> using a MIDI'd 303 clone. You would have to use CV/gate and a suitable
> CV/gate sequencer.
>
> Therefore, I need to find some way of sending 'silent notes' via MIDI.
>
> This would certainly be pretty straightforward to do, there are a number
of
> ways I can think of doing it. However, I would like to update my midiDAC
> firmware if possible to include this feature, so that other '303 clone
> owners (eg. tb3030) using the midiDAC could do the same thing. So, is
there
> a standard way of doing something like this? I was thinking of doing this:
> if a note is received with a velocity of 1, then don't trigger the gate.
> This would make it easy to use with an ordinary computer / hardware
> sequencer, and should not interfere with normal operation / playing
styles.
>
> I'd be grateful for any suggestions on this.
>
> Thanks!
>
> Trev
>
> Some TB3030 'insides' pics now at:
>
> www.resonance.fsnet.co.uk
>
>
>
>