[sdiy] A question about phasers/notch filters

[Neil Johnson]

Hi Tom,

> The bit I don't get is why adding that shifted signal back to the
> original would give *moving* notches. I suppose it's to do with the
> beat frequencies between the two signals, in the same way that two
> close frequencies sound like one frequency modulated by an LFO
> (which isn't really there). I'll have to think about that a bit more
> until it becomes clearer.

I think you need to go back and think about the fundamental principles 
of signals and signal processing.  The answer to your question is based 
on the fundamental relationship between 'frequency' and 'phase'.

Cheers,
Neil
-- 
www.njohnson.co.uk