Inspired by Greg Zifcak/foleymachine's pitchmod, I modded my LinnDrum in a similar way:

http://www.youtube.com/watch v=g6EfM7cdBbk

Soldering in the Linn's a bit easier than the 707! ;)

--- In tr-707@yahoogroups.com , "kb_cheapmods" <kerrybradley@...> wrote:
>
> 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
> > > >
> > >
> > >
> > >
> >
>