Re: [LAD] Determining Phase

 From the long list of answers, I see lots of speculation about Mr.
Shirkey's question. Some time back he approached me on the work that had
been done a very long time ago on phase-modulation to achieve panning.
He never replied to my subsequent information or queries. I suspect that
this question is really all about the phase of the signal being
transported through any given audio driver, ALSA, JACK or whatever, so
the analysis is somewhat germane.

I think that a phase demod analyzer might be his attempt to solve his
real problem. I speculate that Patrick didn't actually ask his real
question.

So, perhaps any Haas-effect plugin would satisfy Patrick's needs.

Other than that, I'd make a really cool spectrum analyzer that ran the
Fourier analysis on two channels, correlated their phases then made a
+/- line vs. frequency for all to see so that the phase of the
components of the spectrum could be watched for phase relationships.

Suggestions?

On 06/25/2011 09:23 AM, pshirkey@email-addr-hidden wrote:
> Hi,
>
> Can anyone point me to a simple code example for how to determine the
> phase at a specific time in a waveform?
>
> ex. if I have a sample that is 5 seconds long and want to know the phase
> at 2.5 seconds
>
> I'm open to code in any language or a scripted example if such a tool
> exists. If there is an ui which has that feature I am also interested.
>
>
> Cheers
>
> --
> Patrick Shirkey
> Boost Hardware Ltd
> _______________________________________________
> Linux-audio-dev mailing list
> Linux-audio-dev@email-addr-hidden
> http://lists.linuxaudio.org/listinfo/linux-audio-dev
>
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Received on Sun Jun 26 08:15:02 2011