02-12-2023, 12:23 AM
(01-12-2023, 09:25 PM)Mike Watterson Wrote: ..., it's rare audio that is net asymmetric as that would be a DC offset. The AC coupling will remove it.
I'd have to disagree there. Although it may be rare audio, it's quite easy to have a waveform that is asymmetric, one peak much higher than the other, with no DC offset - so AC coupling does nothing to remove it.
Waveforms with even-order harmonics will often be asymmetric. The waveform I sketched is an example - no DC offset, but one peak much higher than the other.
Going back to the OP's starting post, with conventional audio it would be jolly difficult to arrange the phasing such that upward modulation exceeds 100% while downward never exceeds 95% (the point at which simple diode envelope detectors often start to distort), but with digital signal processing and a bit of delay between signal 'in' and signal 'out' then I daresay it would be possible.
