[sdiy] Yamaha CS-50 High Pitched Voice - Update w/ Soundclip

[doof]

Hello again,

About a week or so I posted a problem with my newly acquired CS50-- the third voice has an extremely high pitch in comparison to the other voices.

A small soundclip running through some notes directly from power on:
http://www.deepflux.com/synth/cs50VoiceProb.mp3
In case you're wondering-- the patch is "Brass1."

I followed Old Crow's advice and swapped out the old 4011 and 4016 on the SH board (only one of each on the cs50 btw) with no success-- high pitch on voice 3 was still there.  Then I went to the KAS board and replaced the two 4016s, but alas no luck again.  Perhaps it's time to play around with the voice's M board?  Any further suggestions would be greatly appreciated -- I'm a novice at troubleshooting circuits.  Thanks.
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