[sdiy] cs 10 pitch

[Rude 66]

hello all,

i still have a problem with my yamaha cs10 that's starting to baffle me. i
got this thing with the keyboard hacked off and in bits and pieces. there
was no bottom anymore either. i mounted the power supply and regulator board
on a piece of wood, and screwed this to the bottom of the cs10, figuring i'd
use it as a desktop.
so far, so good: it's a little scratchy, but it works via cv/gate. the
problem is the pitch. even though it has a Feet selector which goes to '64'
it won't go lower than what's about a c2. anything below that on the midi
keyboard holds just one pitch. the pitch bend and modulation slider won't
work either, despite being wired properly. when the cv/gate inputs are
disconnected, when i touch the sliders i hear sound. even when i touch the
wires to the sliders.

all the wiring seems to be ok, and sometimes the pitch slider will work when
i hold it, but moving it will make tpitch disappear. this makes me think of
a ground problem.. is it possible that the wooden bottom is causing the
ground not to work properly? the funny thing it it will go lower in pitch,
but only using the midi pitch bender on the master keyboard..not the keys.
go figure.
the midi-cv is a syntecno teebee.

any ideas? it's a nice synth, and i can hear the bass potential in it..;-)

thanks!

ruud