Does that mean that the pot goes in between the +V and the 555 OR between the output of the 555 and the 707 pin

---

From: "gregory zifcak" <foleymachine@...>
Reply-To: tr-707@yahoogroups.com
To: tr-707@yahoogroups.com
Subject: [tr-707] Re: Pitch MOD for your tr-707
Date: Mon, 23 Oct 2006 18:41:49 -0000

the output of the 555 connects directly to the pin, or to the track
connecting to the pin. nothing connects to the other side of the cut
track. as long as the 555's ground is connected to ground within the
707, no other connection is necessary (except for anything else that
happened to get disconnected when the track was cut).

hope that helps,
greg

--- In tr-707@yahoogroups. com , "virusmpc" <barsntone@. ..> wrote:
>
> "3. solder the outputs of the 555 oscs to the pins."
>
> Could somebody describe this in a little more detail
>
> Does this mean after you cut one of the pins, i.e. pin 56, the output
> of the 555 goes in series with (in between the cuts you just made)
> pin 56, or does one side of the 555 goto one side of the cut, and the
> other to ground or some other pin
>
> Thanks!
> J.R.
>
> --- In tr-707@yahoogroups. com , "bisaillon3" <bisaillon3@ > wrote:
> >
> > > --- 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.
> >
>