yeah, the lmc555 is definitely the one. i would recommend removing
the ne555 from the files section and replacing it with the lmc555 pdf
to cut down on future confusion. basically you want any 555 that says
cmos on the package or is 7555 or lmc555.

--- In tr-707@yahoogroups.com , <bentron@c...> wrote:
> Hi,
>
> i ´m new to this very nice group and i ´m working on the pitch mod
too.
> since ´i ´m a bit confused now about wich ic is the right one (ne555,
lmc555) i give you both infos:
> ne555: --> pdf uploaded to files section
> lmc555: http://www.produktinfo.conrad.com/datenblaetter/175000-
199999/182877-da-02-en-IC_LMC555.pdf
>
> if there are any more versions of the 555 i don ´t have the info...;-
)
>
> best regards,
>
> max
> ----- Original Message -----
> From: bisaillon3
> To: tr-707@yahoogroups.com
> Sent: Friday, February 27, 2004 8:22 PM
> Subject: [tr-707] Re: Pitch MOD for your tr-707
>
>
> 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.
>
>
>
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