Yamaha CS80

MIDI for the CS-50/60/80 (anything that uses the YM26600 chip) is 
tricky because the encoder is ternary, not binary.  It uses +6.5v, 
common and -8.5v to encode the octave, then the note.  If I were making 
a MIDI interface for the 50 (and I might--I have a 50), I would replace 
both the encoder and the DAC with my own probably-Atmel-based circuit.  
I already did this for the CS-15, so extending it to encode 4 notes is 
not that much more circuit or code.

   Otherwise, you would need a MIDI retrofit that uses optos or analog 
switches to act as a second set of contacts across each key.

   --crow
/**/

On 8/24/2014 6:20 PM, pinky pinksoir@... [yamahacs80] wrote:
>
>
> Hi guys,
>
> I've been looking for a note on/off solution for MIDIfying my CS50. 
> Does anyone know if something like the Highly Liquid UMR2 would work? 
> It says it needs a keyboard matrix to work.
>
> UMR2: http://forum.highlyliquid.com/showthread.php?t=1133
>
> CS50 manual: http://www.cem3374.com/docs/Manuals/Yamaha/CS-50_SM.PDF
>
> Thanks!
>