Re: [sc-users] Voicer / VoicerProxy / pitchbend

[Dan Stowell <danstowell@xxxxxxxxx>]

2009/7/23 James Harkins <jamshark70@xxxxxxxxx>:
> On Jul 23, 2009, at 11:29 AM, Dan Stowell wrote:
>
> Thanks James -
> That approach seems to work fine. I have about a dozen possible
> synthdefs, I take it there's no big resource issue to keep one
> Voicer-instance-per-synthdef in a big list despite only using one at a
> time.
>
> No -- they don't use CPU on the server until you ask them to do something.
> Also no client-side threads running in the background. They're entirely
> passive.
>
> I do notice a slight oddity which is that after pushing a new choice
> of Voicer to the proxy, the very first pitchbend instruction seems to
> get ignored, although all subsequent pitch-bends work fine - nice
> sensitivity etc. Easy to work around but a bit odd.
>
> I think this is actually desirable for most MIDI controllers. If you move a
> regular controller to, say, 120, the controller in the first voicer is in
> sync with it and subsequent changes are gradual. Now suppose you swap a
> different voicer into the same proxy, and the corresponding controller is at
> the other end of the scale. Without the sync logic in AbstractMIDIControl,
> your next move of the controller would produce a large, sudden change in the
> value -- typically not wanted in performance.
> Pitch bend is different because most hardware devices spring load the wheel
> to return to center. I can't make that assumption globally, though, because
> you could swap the voicer while holding the pitch bend in a different
> position -- unlikely but the software has to be prepared for it.
> At some point I want to add a flag to disable synchronization per control. I
> won't be able to get to that quickly, though.

That's fine - thanks for the explanation.

Dan

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