Flanging Animations

Changing the Delay Time

The comb filter pattern – the number and frequency locations of all of the peaks and notches – depends directly on the delay time separating the direct signal from the delayed signal.  Sweep the delay time, and the comb filter pattern sweeps too.

Watch the animation below to see that, as the delay time increases, the peaks and notches decrease, sweeping leftward toward lower frequencies.  As the delay time decreases, those peaks and notches increase, sweeping back to the right toward higher frequencies.

[animation has no audio – it’s one for your eyes, not your ears]

Changing the Amplitude

The strong spectral impact of Comb Filtering is at a maximum when the direct and the delayed signals are the exact same amplitude.  Turn either one of the signals down – or up – and the peaks will fall, and the notches will fill-in.

[animation has no audio – it’s one for your eyes, not your ears]