[sdiy] Tuneable CV Quantizer

[Theo]

Just setting up 64 comparators ain't gona work since all comparators with a
lower threshold as the input will be activated.
Therefore there must be a kind of priority system to select only one active
output.
What you describe is most easily done with a AD converter and a 64 x
multiplexer.
You would have no input threshold potmeters, but for what you describe
(standard issue quantizer use btw) these are not needed anyway.
But if it is just about having loads of potmeters, you might put up 64 fake
pots ;^)

Theo


From: John L Marshall <john.l.marshall at gte.net>

> Again, I like the idea of 64 comparators with adjustable input thresholds
> and 64 pots to set the output level.
>
> You can do Harry Partch music with 43 notes per octave.
>
> Feed an up ramp in and you can do the sequencer thing.
>
> Feed a down ramp in and the sequencer runs backwards.
>
> Feed a triangle in and the sequencer runs upand down.
>
> Lower the amplitude and the sequence shortens.
>
> With the pots you can create quantization errors (backward steps).
>
> Real synthesizers have lots of pot.
>
>
> ----- Original Message -----
> From: Steve Ridley <spr at spridley.freeserve.co.uk>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Thursday, September 27, 2001 12:46 PM
> Subject: Re: [sdiy] Tuneable CV Quantizer
>
>
> >
> > > I am currently trying to figure out a way to build a tuneable
quantizer
> so
> > I
> > > can get non-standard tunnings and that type of thing. Does anyone know
> > > of anything like this that is around yet that I can maybe hunt the
> > schematics
> > > down for, or any ideas on how I could make this work.  I have not had
> much
> > > luck trying to figure this one out yet, any help would be appreciated.
> >
> > The Buchla 246 Sequencer could double as a sort of quantiser.  It had
> > voltage selection of stage, so you stick a CV in there and the output
> > steps between the pot settings.  If you're going to have a quantiser
with
> > loads of pots, it makes sense that it can double as a sequencer.
> >
> >
> > Steve Ridley
> >
> >
> >
>
>