> The biggest problem with the VCO design is that the control voltage that determines the frequency is generated by a complex circuit that is very sensitive to temperature drift and manufacturing tolerances. This means that the generated control voltage might not match up to exactly to what it should be for the desired note and it'll end up sounding out of tune. What's worse is that even if you adjust for this you'll need to re-adjust as the instrument gets warmer!
Instability ironically prized and cherished by synth enthusiasts who will claim it makes old synthesizers sound "better" than modern ones...
Instability ironically prized and cherished by synth enthusiasts who will claim it makes old synthesizers sound "better" than modern ones...