Oh, and I forgot to mention that the problemtic note actually plays
well for a few seconds when I turn on the synth, and only than starts
to sound odd. It this temperture related ? I can try using cooling
spray on those parts.
--- In PolySix@yahoogroups.com, "gil_we" <gilwe@h...> wrote:
> Glad to hear you found the cause for the problem !
>
> Actually have a much similiar problem on my Kawai SX-210 (great
> synth BTW),
>
> One of the 8 notes it can play (oscillator) will always sound
duller
> than the other 7. Actually, it is like the EG (the filter's ADSR)
> won't effect on it. When you play some chord that contains the
> problemtic note, the whole sound will sound scattered (ta ta ta ta
ta)
> and as you tweak some parameters on the EG (ADSR) it will sound
> faster or slower (the "tatatatata" sound).
>
> I was mainly focued on the computer board as the problems started
> when the battary (placed on that board) has leaked all over, so I
> had to reaplce some parts and rewire many traces,
>
> But now it looks like the problem should lay on the 2nd oscillator
> (that's the one that sounds different). Is that right ?
>
> I noticed the audio circuit uses the same SSM2044 chips (for
> filters?) but no 2056 chips. Instead there are a few CD4066BE chips
> for every oscillator. Is that the EG chip ?
>
> I saw that the Moog Taurus uses the same CD4066BE chip on the
> Filter/VCA/Envelope circuit... like on the following link -
>
> http://home.debitel.net/user/jhaible/jh_minotaurus_1.pdf
>
> Thanks everyone for any advice !