[sdiy] Frequency shifted from BBD?

[Tom Wiltshire]

> On 7 Oct 2024, at 00:09, Benjamin Tremblay via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> Why not generate the clocks with the MCU and skip voltage control?

You could, and that would produce a further simplification of the required circuitry. However, it's not entirely equivalent because any digitally-generated clock will have discrete frequency steps.

My Flangelicious design uses a uP to generate an LFO-modulated BBD clock. The LFO is done in firmware and the clock is an NCO hardware module on the microcontroller. It makes for a very simple circuit compared to most flangers, but it has a weird watery R2D2-like background noise caused by (I think) frequency spurs from the NCO. A genuine VCO for the BBD would sweep smoothly and eliminate this source of noise.

https://electricdruid.net/flangelicious-a-super-dooper-flanger/