[sdiy] Pitch shift in modulated BBD delays

[Adam (synthDIY)]

Fabulous work Tom!

And the outcome of moving that graph slider was ... errr...  wormhole-inducing, or summat!

A

> On 16 Jun 2026, at 23:20, Tom Wiltshire <tom at electricdruid.net> wrote:
> 
> 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/
> 
> Any thoughts, comments, or error-spotting appreciated.
> 
> Thanks,
> Tom
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