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In Reply to: Re: Digital sound posted by Pedja on May 31, 2002 at 14:39:56:
I know the defunct Audio Magazine had square-wave response traces for CD players and DACs, and I think Stereophile once published "impulse response" traces as well. The impulse response trace usually looks like a "sinc" function (the trace may be inverted with some players/DACs) which is the time-domain function used to "convolve" (filter) with the CD signal. Both of these types of traces indicate "time-domain" response.Note that aside from rise and fall times, it is difficult to "quantify" time response.
If the CD players or DACs use the classical "sinc" interpolation algorithm (which accounts for over 95 percent of such units produced over the past decade), the square wave and impulse response traces look almost identical amongst these players and DACs. For this very reason, magazines have stopped publishing the time-domain response traces, in the name of saving print space. ("You've seen one, you've seen them all.")
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- Re: Digital sound - Todd Krieger 17:33:14 05/31/02 (0)
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