Re: [LAD] Determining Phase

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To: <linux-audio-dev@...>
Date: Saturday, June 25, 2011 - 3:57 pm

On 06/25/2011 04:23 PM, pshirkey@boosthardware.com wrote:

talking about the "phase" at some particular point in time doesn't make
sense. first you would have to do an fft (whose resolution is bound by
the window size), and then you'd have to look at each frequency bin
separately, because they will all be at different relative phase.

when you talk directly into my ear, the voice/ear system will be roughly
zero phase. when i move away even a few inches, there will be a linear
phase "distortion" due to the fact that i'm now one wavelength away at
some mid frequency, but several wavelengths at high frequencies.

so "phase" is not really a meaningful thing unless you are talking about
recombination of strongly correlated signals.

another example: if your sample consists of a sine at 100hz and one at
200hz, after 10ms the first component will be at 0° while the second is
at 180°, iff both started at 0° in the first place. but why would anyone
care? with real-life sounds, this whole exercise becomes meaningless.

what are you trying to accomplish?

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Messages in current thread:
[LAD] Determining Phase, , (Sat Jun 25, 2:29 pm)
Re: [LAD] Determining Phase, Gordon JC Pearce, (Sun Jun 26, 3:24 pm)
Re: [LAD] Determining Phase, gene heskett, (Sun Jun 26, 6:54 pm)
Re: [LAD] Determining Phase, Gordon JC Pearce, (Sun Jun 26, 10:01 pm)
Re: [LAD] Determining Phase, Duncan Gray, (Mon Jun 27, 12:50 am)
Re: [LAD] Determining Phase, Fons Adriaensen, (Sun Jun 26, 8:08 pm)
Re: [LAD] Determining Phase, Duncan Gray, (Sun Jun 26, 3:14 am)
Re: [LAD] Determining Phase, , (Sun Jun 26, 8:56 am)
Re: [LAD] Determining Phase, Jörn Nettingsmeier, (Sun Jun 26, 9:58 am)
Re: [LAD] Determining Phase, Arnold Krille, (Sun Jun 26, 3:47 pm)
Re: [LAD] Determining Phase, Jörn Nettingsmeier, (Sun Jun 26, 4:06 pm)
Re: [LAD] Determining Phase, Arnold Krille, (Sun Jun 26, 4:24 pm)
Re: [LAD] Determining Phase, Rui Nuno Capela, (Sat Jun 25, 10:40 pm)
Re: [LAD] Determining Phase, , (Sun Jun 26, 9:19 am)
Re: [LAD] Determining Phase, Rui Nuno Capela, (Sun Jun 26, 4:36 pm)
Re: [LAD] Determining Phase, Fons Adriaensen, (Sat Jun 25, 7:30 pm)
Re: [LAD] Determining Phase, Gabriel M. Beddingfield, (Sat Jun 25, 6:55 pm)
Re: [LAD] Determining Phase, Fons Adriaensen, (Sat Jun 25, 7:49 pm)
Re: [LAD] Determining Phase, Emanuel Rumpf, (Sat Jun 25, 10:04 pm)
Re: [LAD] Determining Phase, Gabriel M. Beddingfield, (Sat Jun 25, 10:44 pm)
Re: [LAD] Determining Phase, Emanuel Rumpf, (Sat Jun 25, 11:27 pm)
Re: [LAD] Determining Phase, Emanuel Rumpf, (Sat Jun 25, 10:30 pm)
Re: [LAD] Determining Phase, Jörn Nettingsmeier, (Sat Jun 25, 10:23 pm)
Re: [LAD] Determining Phase, Fons Adriaensen, (Sun Jun 26, 2:17 am)
Re: [LAD] Determining Phase, Jörn Nettingsmeier, (Sun Jun 26, 9:43 am)
Re: [LAD] Determining Phase, Fons Adriaensen, (Sun Jun 26, 11:26 am)
Re: [LAD] Determining Phase, , (Sun Jun 26, 8:50 am)
Re: [LAD] Determining Phase, Fons Adriaensen, (Sun Jun 26, 12:56 pm)
Re: [LAD] Determining Phase, Erik de Castro Lopo, (Sun Jun 26, 10:27 am)
Re: [LAD] Determining Phase, , (Mon Jun 27, 12:41 pm)
Re: [LAD] Determining Phase, Fons Adriaensen, (Mon Jun 27, 8:16 pm)
Re: [LAD] Determining Phase, Fons Adriaensen, (Mon Jun 27, 8:19 pm)
Re: [LAD] Determining Phase, Jörn Nettingsmeier, (Mon Jun 27, 1:14 pm)
Re: [LAD] Determining Phase, Folderol, (Sat Jun 25, 10:35 pm)
Re: [LAD] Determining Phase, Gabriel M. Beddingfield, (Sat Jun 25, 9:33 pm)
Re: [LAD] Determining Phase, Jörn Nettingsmeier, (Sat Jun 25, 3:57 pm)