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RE: May I enquire why you persist wasting time?

Posted by Tony Lauck (A) on April 27, 2015 at 12:56:29

In Reply to: May I enquire why you persist wasting time? posted by Thorsten on April 27, 2015 at 10:54:39:

It's even more complicated. There are at least three filters involved:

1. The filter(s) used to produce the 44.1 kHz input recording
2. The filter used to upsample 44.1 to 176.4 (as used to create the A file or the B file)
3. The filter(s) used in the DAC (e.g. digital and/or analog)

Your complaint is that the filters in (2) and (3) interact. This is correct, however this interaction is at the 176.4 sampling rate and above. As such, it is relatively less important than the interaction between the filters in (1) and filters in (2), which interaction is at 44.1 kHz. In any event, the test remains interesting if one's goal is to examine the difference between various upsampling filters one might use in a computer to upsample 4X before going to one's DAC. With some DAC chip architectures, entering the DAC at 176.4 bypasses two stages of sample rate doubling by the DAC chip, in effect replacing them with the filtering in the computer.

Doing critical listening is not a waste of time. One benefit is to learn how to hear certain subtle types of distortion. Being able to hear distortion is an important skill for a manufacturer, recording engineer, or audiophile. (Alas, the ability to hear subtle distortion may be detrimental to a music lover.)


Tony Lauck

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

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