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In Reply to: RE: Summary article on importance of transients over pitch posted by hemholtz on September 16, 2014 at 16:48:27
If you can get the result only at a single point in space does it really satisfy the linear phase objective??
With a point source transducer in an anechoic environment the phase response you've shown might be achievable at a variety of microphone positions.
The audibility of phase distortion has been discussed in audio circles for years. There's still no consensus on whether it is or not. :)
Regarding the DEQX: It's difficult to say why that unit has not been more successful. It does what it's advertised to do, but I think this aspect of loudspeaker reproduction is not understood by the vast majority of audiophiles.
Cheers,
Dave.
Follow Ups:
the mic position to make the filters for the deqx was kind of tricky to get that measurement at the listening position. it shows that the phase correction can extend to the listening position. the measurement at the listening position was even taken with different software just to be sure. i picked the best looking part of the graph, but i think the midrange is the most critical anyways.
Yeah, that's my point. The phase response is only achievable at a single point in space. Once you move your microphone it all falls apart.
You would probably counter with......"isn't the listening position the only point that matters?"
I would counter with......"is it?"
This is a tricky topic and I suspect there's also confusion on the difference between "transient perfect" and "transient response." They're two completely different things.
Cheers,
Dave.
One of the problems may be that many recordings are made with multiple microphones and after these get mixed down there can be a total phase jumble.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
I'm not sure where the "problems" come in?The test tones, used to test the phase linearity of the speakers, won't be a jumble and if one can straighten out the speakers then at least we will hear the jumble on a recordings the way the producer intended. :-)
The jumble on the recording is what it is. I wouldn't want to "fix" it if I could. That would be like repainting the Mona Lisa.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 09/17/14
My point is that the audibility of phase distortion in a loudspeaker assumes that there isn't already gross distortion on the recording. If there is, it will likely mask any phase distortion in the speaker, or worse, make a bad recording sound better, possibly leading to a poor choise of system components or system setup.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
.
Have Fun and Enjoy the Music
"Still Working the Problem"
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