> The output voltage across the range can vary as much as 1 Volt, but that's fine- your ear won't really be able to tell the difference.
If I understand correctly, the output from the sawtooth has a voltage offset? Can that lead to DC passing through speakers? And would the pulse-width comparator input need an equivalent voltage offset?
Did you mean that the amplitude of the sawtooth can change by up to 1 volt (due to imperfections in the differentiator and amplitude compensator)? And if the PWM is based on comparing the sawtooth with a fixed voltage, and the sawtooth amplitude changes with pitch, does the PWM width change with pitch?
You're correct. The pulse-width of the saw wave is very dependent on the amplitude of the saw, so when there's a 1 volt deficit in the saw wave's amplitude you lose about 8% of the pulse width. It's really not that noticeable in practice, though, and if anything it adds to the sonic character of the juno.
If I understand correctly, the output from the sawtooth has a voltage offset? Can that lead to DC passing through speakers? And would the pulse-width comparator input need an equivalent voltage offset?