Power cord and IC affecting sound..

[Thomas_A]

I still don't understand why there is a problem with the system as long as there is a symmetry between channels (same group delay).Of course there is a continuous change in the complex signal, and it is not "constant" over time between channels, but I can only see systematic error which is unequal between channels, e.g. 1 metre and 20 metre cable, which can be audible in this case. The phase shift that translates into group delay has been in several studies been around 1-2 ms in the 1-5 kHz range (with clicks, headphones).

Now as JNeutron indicates, I may confuse two different issues. I have spoken to a person working with recognition of speech and sound at the Royal Technical High-School, and he promised to give an opinon in this matter.

T

[mtrycraft]

I still don't understand why there is a problem with the system as long as there is a symmetry between channels (same group delay).Of course there is a continuous change in the complex signal, and it is not "constant" over time between channels, but I can only see systematic error which is unequal between channels, e.g. 1 metre and 20 metre cable, which can be audible in this case. The phase shift that translates into group delay has been in several studies been around 1-2 ms in the 1-5 kHz range (with clicks, headphones).

Now as JNeutron indicates, I may confuse two different issues. I have spoken to a person working with recognition of speech and sound at the Royal Technical High-School, and he promised to give an opinon in this matter.

T

It's good to know talented people

Even if the two channels have a small difference, the delta between the two woul dhave ot be approaching the tresholds which would mean that one would be way off from the other, maybe unlikely.
But, in recordings, you have both left and right channel information in each channel but at different levels and maybe even in phase to give you better soundstage presentation. There is no pure left and right signals only.
I'd like to see someone localize an instrument in a band, blind, to that level of accuracy consistently in recorded music.