Vintage Synth Repair

OK, that shows that the DAC is working properly.

Next test: Put the filter into self-oscillation (resonance max, cutoff so
that you hear some sound) and set keyboard tracking to max as well. Play
some notes of check if the oscillating filter itself (not the oscillator)
roughly tracks properly or if the behaviour is identical to the oscillator.

BTW, those small offsets of the CV are nothing to worry about at this
point. The synth should work almost prefect even with those small offsets.

You're right, the CV in jack is normalled; when thre is no CV in connected
the keyboard CV is used automatically (same for the Gate). The CV then
passes through the Portamento circuit to the oscillator and the filter.

Another question: Does the "Range" switch change to tuning of the
oscillator (it will not change the filter, though)?

-- 
Malte Rogacki gacki@...
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"Don't forget to TURN ON THE SYNTHESIZER. Often this is the reason why you
 get no sound out of it." (ARP 2600 Owner's Manual)
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