[sdiy] cr78

[Rude 66]

i just kind of fixed a very weird cr78... everything was screwy: the beats
were off (ever heard a guiro run out of sync?) switches didn't work and it
has an added midi board with 2 unlabelled midi ins or outs on the back.
sometimes it would run, sometimes just lock up.
after taking a long time to figure out the midi doesn't sync the sequencer,
but lets you play its sounds over midi on channel 10, that was done. all i
did then was take it apart, clean the pots and sliders, took all the
connectors off and put them back on again, gave the big IC a gentle nudge in
its socket. and hey presto, a working cr78 again. it never fails to amaze me
how easy a lot of this stuff is to fix just by cleaning and replugging
things.

however, next to the hihat voice cancel knob not working, the hihats are
still funny. when the big rhythm knob in the programmer section is set to
anything but the hihats, these run at double speed (or 1/32 measure) crazy
and unusable. when i set the thing to hh, all is ok. what can this be? i
notice when i set it to either bass or snaredrum, it cancels their voices. a
double trigger on the hihat somewhere? the non-functional voice cancellation
switch shorting?

btw there are trimmers for most sound's volumes, tuning and decay on the
bottom circuit board underneath the machine. that bd can really be made to
sound quite good! anyway, this one ain't mine, but this box screams for a
breakout box with pots for all this, indie outs for the sounds and a sync in
modification.. and it definitely still is the sexiest sounding beatbox
around..;-)

thanks!

ruud

www.bunker-records.com/rude66