> --- In benders@yahoogroups.com , "foleymachine" <foleymachine@y...>
> wrote:
> > hi,
> >
> > in case anyone is interested, i added pitch knobs for each of the
> > sounds in my 707. the ones that share volume sliders also share
> pitch
> > knobs, and the ride and crash have a single pitch control as

well.

> > it's awesome; the sounds are 8 bit so it sounds all gritty and
> > industrial when you pitch them down. it's not a simple mod,

however:

> >
> > 1. build nine 555 (the cmos version) oscillators. these are the

new

> > clocks for the sounds.
> >
> > 2. very carefully disconnect pins 56, 57, and 59-64 of ic30 from
> the
> > circuit board. i tried just cutting the traces, but some of them

go

> > underneath the ic. this part is delicate because it is a surface
> > mount ic. i used an exacto blade.
> >
> > 3. solder the outputs of the 555 oscs to the pins. this part is
> > difficult because the pins are small and close together. i guess

if

> > you wanted you could just build a single oscillator and solder it
> to
> > all the pins for a global pitch control. that might not work
> though,
> > because i suspect that some of the sounds run at a different

sample

> > rate.
> >
> > 4. TEST.
> >
> > 5. put some kind of nonconductive matterial under (and possibly
> > between) the pins and hot glue the whole mess or something to

keep

> > those little pins from shorting together or breaking off.
> >
> > 6. mount the pots and you're done.
> >
> > or you could just go and sample its sounds and tune them up and
> down
> > that way, but that would be easy.
> >
> > also, i tried connecting the oscillators to the pins while they
> were
> > still connected to the circuit board and got all kinds of crazy
> > noises that sounded way better than my rom-scrambling bends. it

was

> > like pitching the sounds and adding tones and messing with other
> > circuitry that was also connected to the clocks. i might add this
> > function to mine later.