Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 (Tek) 9/26/83; site azure.UUCP
Path: utzoo!watmath!clyde!akgua!sdcsvax!sdcrdcf!hplabs!tektronix!teklds!azure!michaelk
From: michaelk@azure.UUCP (Michael Kersenbrock)
Newsgroups: net.audio
Subject: Re: cd playback sampling delays
Message-ID: <2774@azure.UUCP>
Date: Wed, 16-May-84 13:06:19 EDT
Article-I.D.: azure.2774
Posted: Wed May 16 13:06:19 1984
Date-Received: Mon, 21-May-84 04:59:34 EDT
References: <415@houxa.UUCP>
Organization: Tektronix, Beaverton OR
Lines: 24

<***>
In regards to DAC flopping causing phase delays, I think it needs
to be pointed out that the delay is a **constant time delay** regardless
of frequency.  This means ZERO group-delay distortion or "linear-phase",
so there is NO distortion produced by this effect.  But wait, there is more.
     "Everyone" knows that moving your speakers around in your room
definitely  makes a difference in what things sound like due to interchannel
phase differences, reflection differences, and whatever you please.
I don't know *which* channel of my CD player is the "late" channel, but
for this example I will say it is the right channel.  The right channel
comes out 11uS after the time is should have.  Sound travels 0.15 inch
in 11uS.  If I move my right speakers forward (toward me) by that distance,
it makes all sound from that speaker system come at me 11uS earlier that
it did before I moved them.  I have exactly compensated for the DAC
sampling interleave.
    What does this mean?  If you CAN tell the difference of moving your
speaker 0.15 inch, then you can also tell the difference between the
Sony CDP-101 (one DAC) and the Sony CDP-701 (two DACs), BUT you 
can compensate by moving the slow speaker channel by 0.15 inch toward
you.

Mike Kersenbrock
Tektronix Microcomputer Development Products
Aloha, Oregon