[sdiy] Pitch shift in modulated BBD delays

[Tom Wiltshire]

I've spent a long time wondering about how the LFO waveshape relates to the final pitch shift you get when modulating a BBD clock, as you would in a Chorus or Flanger circuit. Or even a delay-based analogue vibrato, come to that.

I recently managed to get some interactive demonstrations done, which I think make the whole thing a lot easier to understand. Here's the finished article. Perhaps some of you will find it interesting.

https://electricdruid.net/weird-wiggles-bbd-clock-modulation/ <https://electricdruid.net/weird-wiggles-bbd-clock-modulation/>

Any thoughts, comments, or error-spotting appreciated.

Thanks,
Tom
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