From: utzoo!decvax!cca!hplabs!pdh Newsgroups: net.audio Title: Re: Digital vs. analog Article-I.D.: hplabs.607 Posted: Wed Aug 4 01:31:11 1982 Received: Thu Aug 5 00:59:31 1982 References: tekcrd.364 I, too have heard of a number of good arguments against digital recording techniques using the 50Khz sampling rates. The best one I have been able to come up with so far is that, at that sampling rate, potential channel-to- channel phasing misalignment at much over 15KHz COULD be tremendous, possibly as high as 20 or 30 degrees. This phase misalignment would vary with frequency, due to the way the A/D's work, and so the final result is a piece of music with very vague and poorly defined imaging. I have noticed this in every digital album I have heard to date (about 30). The big deal with this is that the problem won't go inaudibly away until the sampling rate is up around 300KHz or more, which is WAY out of the range of technology. One possible solution to the problem would be to digitize the signal from the microphones onto several different digital master tapes, and then use a computer to correlate the signals, and assure proper phase alignment. This should work by statistically making the maximum phase alignment proportional to the number of master tapes being correlated into a single master. Peter Henry hplabs!pdh