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RE: There were no results to deny.

"Are you not seeing the apparently strong patterns in the results?"

I didn't attempt to draw any conclusions, other than that the results were about as I expected due to the nature of this kind of test, etc... I was not going to participate at all originally, but decided to do so just for fun.

As expected, I got all three questions correct. Although my room is not so quiet on most occasions, I have a system that will play cleanly at ear splitting levels and is dead silent at my listening position, or even when my ears are right next to the drivers. (Rated 118 dB from speakers, 128 dB DNR for DAC.) There is no problem hearing 16 bit dither noise when the volume is cranked up to painful levels when all unneeded equipment has been shut down. Whether this resolution matters or not depends on the musical source, for example how quiet the microphone preamplifier was.

The past I did considerable research into the theory and practice of dither. In the course of this effort I trained myself to recognize distortion when converting to low bit depth, going as far down as 8 bits, where the differences are extremely obvious. Along the way I acquainted myself with the various tricks and techniques to make audible differences harder to discern, i.e. to make the artifacts more obscure and less obvious. I have no problem hearing different dither algorithms at the 16 bit level, at least at 44 kHz. There are dither algorithms applicable to higher sampling rates that could have obscured matters to the point where I would have had difficulty hearing the differences with my equipment, but these were not used in the tests.


Tony Lauck

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

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