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RE: Questions to ponder

Posted by pictureguy (A) on May 22, 2015 at 18:15:24

In Reply to: Questions to ponder posted by unclestu on April 21, 2015 at 21:45:29:

You are mistaking PHASE for IDENTITY.
A mono signal from 2 speakers is essentially identical, to the limits of the drivers and electronics ability to reproduce it. All difference signals are phased out. or Should Be.
I suspect that stereo is has a high percentage of near-identical data between channels. Somebody can tell me how much in common a signal with 20db of seperation has.

The way CARVER handled this information was as follows. He realized that the left and right channels contained information from the OTHER channel and that such data reached BOTH ears, with a time delay based on what is basically the distance between ears. Their is also a frequency component to this also, since one side of the head is in the sound SHADOW and will attenuate HF as well as being slightly delayed relative to the other side.
So what did Carver do?
He basically subtracted L/R common from the RIGHT and R/L common from the LEFT. This leaves you with a pure L or R signal and superior channel separation,
Polk did the SAME thing by placing 2 midrange speakers (maybe tweeters, too?) the inter aural time delay distance apart on each enclosure. Than they simply ran speaker wires between the enclosures to do the same thing as Carver accomplished at line level, only at speaker level.

So there IS room for improving the stereo illusion. The Carver circuit, which he called 'Sonic Hologram' came to be known as Sonic Holocaust. Polk made the speakers long enough to STOP making them and the whole idea was never heard from again.

Keeping the right channel out of the LEFT ear and left channel out of the RIGHT ear has a certain rightness to it.
You might be on to something, but maybe a little history will help figuring your way thru it.

I'd experiment with a BINAURAL recording on your setup. 'See' what effect that has and if the sound / image improves or what.
Too much is never enough

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