Sample/Hold on a Korg Mono/Poly

[The Old Crow]

  Having nothing much to do today other than tinker with synths, I decided
to give the Mono/Poly I just acquired from eBay a Sample/Hold circuit.
Using a fairly basic LF398 S/H circuit and feeding it the un-attenuated
white noise avaiable one side of the noise level control, I installed a
pair of (SPDT) switches onto the pitch/mod wheel platform to select
MG1/MG2 as the S/H clock source and whether the mod wheel sees MG1 or thw
S/H output.

  Seems to work great.  The only twist I plan to incorporate is a
PIC12C508 to produce 4 microsecond sample pulses vs. the simple RC
front-end currently hung on the 'sample' pin.  Then I can do fun things
like select samples on rising, falling or both edges of the MG1/MG2 clock.

  Tomorrow I'll take picture and document the procedure and place on the
website alongside my Polysix stuff. (As well as make a real PC board for
it as opposed to the little ratshak veroboard currently installed).

Crow

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