[LAD] Determining Phase
duncang at catraeus.com
Sun Jun 26 03:13:50 UTC 2011
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
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.
On 06/25/2011 09:23 AM, pshirkey at boosthardware.com wrote:
> 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.
> Patrick Shirkey
> Boost Hardware Ltd
> Linux-audio-dev mailing list
> Linux-audio-dev at lists.linuxaudio.org
More information about the Linux-audio-dev