Isn't that what the pitchmod already does

My thinking was that if you run your 555's faster than the stock
sample rate for a voice, then the 707 will be doing a DAC conversion
for that voice every Ts = 1/fs_stock.

Your 555 clock, though, might be incrementing through the ROM at a
faster rate. This means you might be skipping samples: eg, your 555
incremented through 3 ROM locations in when the 707 actually only made
two DAC conversions for a voice.

I don't know if that's actually the case, but maybe it's possible
It might depend on if the Gate Array somehow resynchronizes the new
clock and the MUX/DAC enable. And anyway, since this pitchmod is
intended to change the sound, skipping samples might make the sounds
even more lofi, often a good thing.

--- In tr-707@yahoogroups.com , Sebastian Schünemann <plusworx@...> wrote:
>
> hey!,....
> if you want to pitch the single sounds without negative influences
> for DAC and MUX,...
> cut the traces going to IC30 (gate array) to pins XCK0 - XCK7 and
> then connect the new clocks to these pins,... this should work,.. ( I
> haven ´t tested it yet)
> Best,
> Sebastian
> www.plusworx.org
>
>
>
> Am 17.04.2007 um 02:06 schrieb kb_cheapmods:
>
> > Nice work!
> >
> > Sorta on-topic I was just thinking about doing this mod and I had a
> > question:
> >
> > By overriding the internal clocks of the 707 with a continuously
> > variable 555 ckt for each voice, does this mean you're running each
> > voice asynchronously with the DAC enables (via the front-end mux)
> >
> > I've only read over the schematics once, but it seems to me that by
> > reading out the ROM out of sync with the MUX'ed DAC, you are not just
> > changing the pitch of the sound, but also waveshaping a bit, too.
> > That could certainly sound cool (I need to listen to your MP3's).
> >
> > Does this make sense Am I missing something (like does the 707's
> > gate array take care of the sync)
> >
> > Thanks!
> >
> > --- In tr-707@yahoogroups.com , "Max Sentry" <montyman1@> wrote:
> > >
> > > Check it out.Ebay Item # 180107805879 I'm selling a TR-707 with 10-
> > > voice pitch control knobs and a 20 point circuit bending patch
> > bay and
> > > 4 Decay control knobs on Ebay.It is a MONSTER! Write if you have any
> > > questions.
> > > Max
> > >
> >
> >
> >
>