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If all these old DACs are gone, why the fetish over bit perfect?

The fixation over bit-perfect "processing" stems from the era of 16 bit DACs. This fixation was important in that era, but it is no longer important. What's important is whether any processing improves the sound or makes it worse. That will depend on the system, the listener, and especially, on the recordings.

Manipulating data is what happens with DSP. If no information is lost in this processing, then there may be subjective loss of sound quality, or there may be subjective gain of sound quality. If 16 bit data is played in a computer system and a digital volume control used to reduce the level by a modest amount all of the information on the recording will make it to a 24 bit DAC, so there is no "loss" of information in the computer. There may be loss of information in the DAC itself, but their may also be a gain. Similarly with upsampling or digital room EQ.

Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar

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