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Re: What's the point?

Posted by Dan Banquer (M) on January 29, 2005 at 14:09:08

In Reply to: Re: What's the point? posted by Todd Krieger on January 28, 2005 at 20:25:59:

Yep; I have a scope and a test CD too. Yep; I have seen this before too. Now think about this for a minute: The "digital antidote" is placed after the low pass analog filter so the "time smear" as you referred to it has already happened in the digital filter of the unit and the digital filters in the recording studio. The only thing you are doing is rolling it off so you will be around -2db down at 20 khz. The second thing is that if you bothered to look with a scope at what comes out of your CD player or outboard DAC with music you will find the following. Any square wave like signals will typically be in the range of 2 milliseconds to 5 milliseconds in duration ( that's time high or time low, for frequency double those numbers). Given the slow rise and fall time of the bandwidth limited signal due to what I described above and what is described in the Lavry paper, you will see very little if any time smear as you refer to it.
As I noted in the article that I posted earlier; CD players with brickwall analog filters went out of production in by the late 1980's when they rediscovered that brick wall analog filters had some real problems.
Now to get back to initial question:
WHAT'S THE POINT?
The Ever Evil Doctor Steel.

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