POLY 800 knobs mods

[Adrian Corston]

>>adjust it over a usable range on the trimmers. The res goes spastic
>>all the way up and I don't know how good for the synth it is at
>
>I almost blew my tweeters first time I was testing the mod.  Painful
[...]
>I'm setting up a DPDT switch near the knobs to select between the trimmers
[...]
>>Next project: buy another Poly-800 and rack mount it :-)
>
>Korg has done it already for you, in the form of the EX-800 :)

Yes, but I want to build a CV controller from the keyboard.

How boring is it to buy one that's already been done for you anyway?
Sheesh... :-)

>>Hmmm... I should trace some tracks; it may be possible to use an
>>op-amp and some discrete bits and do a CV cutoff/res inputs mod...
>
>VR2 and VR5 are wired as rheostats, with two leads shorted.  Simple as ya
>get short of them providing cv jacks for ya. :)
>
>There are a couple of mods I'd like to do eventually, once I have more
>confidence in my skills.  A rotary encoder replacement for those bothersome
>up/down buttons.  Sliders replacing the r-blocks so that I'll have more
>control over the waveshape than just saw/square.  Audio in for the filter.
>Enough blinky LEDS to put a christmas tree to shame.  :)
>
>I'm looking for a pair of strap pegs.  My poly-800 was sold to me as

I _think_ they're the same as a CZ1000 (and therefore probably a number
of other Casios), if that helps!


Another friend just mailed me some other dodgy things he's seen done
with Poly-800s:

* Remove the processor while it's playing a chord, and listen to it
  "slowly mutate the sound as its registers decayed".

* Mod the DR-110 to sync to the Poly-800.

The latter might be cool (if I had a DR-110), but I don't think I'll
try the former in a hurry :-)

-- 
Adrian Corston
Internet Engineer
Internode Professional Access