[sdiy] Time-varying all-pass filters
neil.johnson71 at gmail.com
Thu Jan 6 13:08:26 CET 2022
> Then it occurred to me that, assuming the input is a sine wave, a phase shifted version up to 180 degrees could be obtained from modulating an all-pass filter that is also tracking along with the pitch of the oscillator.
See page 22:
That was modulated at a slow (manual) rate, so no idea what it does at
faster rates. Interesting question though....
> ps. Happy healthy new year!
Happy new year to you too!
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