more zero-thru flanging

[christian]

While I was having a cigarette at the balcony and looking at the highest spot in Helsinki right next to our house, thought just hit me.

It´s commonly known for people that have tried zero-thru flanging using 2 parallel BBD´s, one fixed and one modulated, that once the clock-signals get close to each other, they tend to generated audible signal that is in the human-hearable audio-range.
Well that would be the case, if you were using 2 of the same BBD´s.
BUT, what if you´d use one, say, 512-stage and 1024-stage in parallel? When the delay goes thru-zero, the clock signals are as much apart in frequency as the lower-frequency clock is (you have to drive these with 2 clocks that are "octave" apart).
Just a hint for someone who is just dying to build himself a zero-thru flanger and is willing to experiment

[Peter Snowberg]

   

Great Idea.

If you could make the relationship between the BBD lengths non-harmonic it might work even better.