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@counivers its like a delay but some frequencies get delayed more than others
that is the best explanation i have seen so far!
Indeed a good simple explanation.
For 6 year old folks: Every EQ introduces a frequency-dependend phase shift on the frequencies it is operating on. An allpass filter does so without attentuating or lowering the frequency in question.
The human ear is unable to detecr this phase shift, yet in some cases it can have an effect.
This does not happen with FFIR filters, but these introduce a general delay on the entire signal.
@lislegaard @counivers it is a bit of an oversimplification but by the time you finish explaining Laplace/Z transforms to someone who is 5 they might be at least 6 or 7 already
@ahihi favorite comment of the day award