I bought a bunch a 555 chip and now i try to find the schematic of
cmos version... it is possible to draw me the schematic or send it
in the file room. I got no news from roland for the m64-c cartridge
and i still building my eprom burner for the 707. I keep u in touch
with my progress.

bizz


--- In tr-707@yahoogroups.com , "foleymachine" <foleymachine@y...>
wrote:

> yes, each pin corresponds to one (or one pair) of the instruments:
> BD1/2, SD1/2, LT, MT, HT, RIM/COW, CP/TAMB, OH/CH. that is except

for

> the ride/crash, which has a different clock input that i mentioned

in

> a later email. i don't know which pins are for which sounds, i

just

> hooked them up and then mounted the knobs after testing them.
> basically what's going on is the samples are like 32khz or

whatever,

> and there is a corresponding fixed 32khz squarewave coming out of

a

> chip and connecting to all of the clock input pins. disconnecting
> them gives you clock inputs into which you can send individual
> variable-speed squarewave 555 oscillators, which act as individual
> variable-speed sample playback clocks.
>
> the pots i used are pretty small, they're like stompbox pots

except

> the shaft is a little longer. i mounted them all at the bottom of

the

> case, underneath the corresponding sound names. the board with the
> oscillators is just kind of crammed in between the pots and the

two

> main boards. i lined the 555s all up in a row to make the board
> narrow and long.
>
> hot sounds: the snare is really bitchin tuned down, it's like this
> heavy tight smashing sound. tuned up it's nice and march-y

sounding.

> the tamborine is also really great low down, it sounds like this
> faraway clanging down at the shipyard or something. of course
> everything else sounds cool too. the sounds really lose
> their "realism" (great!) when tuned either up or down, i think

this

> is because they are only eight bit, nice and chunky. also you hear
> the aliasing noise when you tune them down below the frequency of
> their anti-aliasing filters.
>
> let me know if you have any other questions,
> greg
>
>
> --- In tr-707@yahoogroups.com , "djdsl_tru" <dsl_tru@h...> wrote:
> > This sounds awesome.. i cant wait to try this mod out. Sounds

like

> > itll be the perfect complement to my heavily bent 626, hell,

maybe

> > it'll work on that box too, if ive got any room left in it that

is.

> > Your'e description is a little hard for me to follow though.

Maybe

> > when I have my 707 open, it'll all come together. Do each of the
> pins
> > that you're disconnecting (56, 57, and 59-64 of ic30 )

correspond

> to
> > one of the instruments
> > Howd you mount all the pots too.. you mustve got some mini ones.
> > Thanks, and its comforting to know theres a few other peoples

out

> > there breathing life into the somewhat dead sounds of rolands

line.

> >
> >
> > --- In tr-707@yahoogroups.com , "bisaillon3" <bisaillon3@y...>

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.