[sdiy] Exponential Keyboard (KORG MS-20)

[yves usson]

You can check the service manual of the Yamaha SY2, (downloadable from
http://www.emusic-diy.org/YamahaManuals ).
It uses the same divider as in the Korg patent and you have all the 
voltage values
listed for each key.

Yves, yusynth

JH. a écrit :
> Try to locate US patent #3918342 about the Korg divider.
> 
> JH.
> 
> 
> ----- Original Message ----- 
> From: "Tony K" <kalotony at videotron.ca>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Saturday, September 01, 2007 11:42 AM
> Subject: [sdiy] Exponential Keyboard (KORG MS-20)
> 
> 
> Hi list,
> 
>   I'm building a keyboard controller for my MS-20 clone project using
> a PAIA 37-note mechanism. It already has the diodes wired
> into a 8 X 5 matrix and I'm tempted to use that with a uC and do a
> digital scanning version with DAC (8051 based - I know I should
> really graduate already, but those MMT8's make great development
> systems - oops the secret is out ! ).
> 
-- 
Yves Usson
http://yusynth.net