[sdiy] Digital accumulator VCO core?

cheater cheater cheater00social at gmail.com
Fri Feb 12 06:52:38 CET 2021

I know there's Hermode tuning also which means that whatever chord
you're playing will be pitch bent a bit to be more in tune. Which is
an interesting development on the whole idea of voice algorithms.
However, the synths I looked at that had this (Waldorf) didn't seem to
have any control over how this is done, so you couldn't set your
specific scale, so I don't know how this would have created good
results unless it always assumed the root note was the lowest note
being played. You could also wish for the ability to have a mod wheel
like controller that selects just how dissonant the chord should be,
for expression - and what sort of dissonance you're looking for
(slow/fast beating). For that last one, maybe a performance controller
like the CS80's sliders (the ones that have a wide knob and turn at an
angle) would be better than a mod wheel style controller.

On Fri, Feb 12, 2021 at 6:46 AM Brian Willoughby
<brianw at audiobanshee.com> wrote:
> On Feb 11, 2021, at 21:34, cheater cheater wrote:
> > On Fri, Feb 12, 2021 at 5:45 AM Brian Willoughby wrote:
> >>
> >> Often, the voice allocation algorithm has a lot more to do with how an analog sounds.
> >
> > In what way? That sounds interesting.
> >
> > Of course note stealing is a thing, but it's not necessarily that
> > important for the sound.
> >
> > Do you mean that the voice allocation algorithm will choose different
> > voices, and those will be calibrated differently, and that's why a
> > different voice allocation algorithm will make the synthesizer sound
> > different? eg round robin vs lowest note priority.
> >
> > Thanks!
> Exactly. You got it. There's also reassign note, where the voice allocation will see that a new note matches an old note on a "silent" voice, and pick that voice over other voices because it should take less time to get that particular VCO to the right pitch because it's actually still running at that pitch.
> Voice stealing and other problems with trying to play too many voices is a separate concern.
> I'm talking about how a chord doesn't quite sound perfectly in tune - even on an analog synths that's warmed up - because each voice isn't tuned exactly and precisely the same as the others.
> Brian

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