[LAD] Determining Phase

pshirkey at boosthardware.com pshirkey at boosthardware.com
Sun Jun 26 08:44:33 UTC 2011

> On Sun, Jun 26, 2011 at 12:22:58AM +0200, Jörn Nettingsmeier wrote:
>> it seems you have just proven that the maximum duration of any pure tone
>> is 1/f. that is quite extraordinary.
> 0.5 / f actually, which is extraextraordinary.
> Both Joern and I have invited the original poster to
> explain more clearly what he wants to achieve. Because
> as it stands his question doesn't make sense and can't
> be answered.

I think you understood what I am looking for below.

> If the purpose of this list is to let people help each
> other with audio software related problems, then the
> other replies so far are, to put it gently, 'unfortunate'.
> To put some things right:
> - Absolute phase response *does* matter. It's quite
> easy to create e.g. a filter that has a perfectly flat
> amplitude response, modifies only the phase, and sounds
> as a e.g. a resonance or even a reverb. You won't hear
> the relatively harmless phase response of a tyipcal amp,
> but that doesn't mean you can't hear phase errors in
> general.

Does anyone have a code example for this type of filter?

> - Phase is related to delay but it is not the same thing.
> Group delay is again something different. Mixing up all
> these is not going to help anyone understand things any
> better.
> Ciao,
> --
> FA
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