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slow/fast roll-off filters pre-ringing in real world?

Posted by dave789 (A) on July 17, 2015 at 08:36:35

Magazines like Stereophile generate single sample pulse in digital domain, and show the impulse response. The slow roll-off filter shows less pre-ringing than the fast roll-off filter.

I am wondering whether this difference is realized in real world music play.

Let us imagine how music CDs are made. Either at the recording step or at the mastering step to 44.1/16 format, the signal goes through fast roll-off filter.

So something like single sample pulse used for Stereophile impulse response test does not exist in music CDs.

I do not know much about AD/DA theory, but I guess that pre-ringing is made by fast roll-off filter, and it does not significantly increase or decrease by going through AD/DA with fast roll-off filters multiple times afterwards. The pre-ringing, once produced, just remains.

P.S.: I just visited Wadia web site. None of their new products claims the usage of Digimaster slow roll-off filter.

Edits: 07/17/15 07/17/15

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