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RE: Cluelessness, Part Deux

"At the expense of stating the obvious, one needs a different clock to operate at 44.1 vs 88.2."

Most likely the converter used the exact same A/D circuitry running at the exact same master clock rate, and used different DSP algorithms to downsample the original data stream to either 44.1 or 88.2. In the playback, your DAC will most likely upsample whichever format back to its master clock rate and play that back. You are hearing ae the differences caused by software, as dictated by the mathematical limitations of the low-res format.

For this reason, the easiest and best way to compare formats is to use the best available software converters to convert a high res format to a lower resolution format and then back up to the original format. Any problems that you hear will be due to the limitations of the converter software or the format. If you use the best available algorithms you will discover, as I have, that the limitations come from the filters. One can try various filter settings and none of them will be transparent. One will lose something, according to the filter settings, e.g. tonality, air, transients, imaging, soundstage. Most of the filter tradeoffs hit in the downsampling process. If these are done right, then the playback filters don't matter much. If these are down wrong there will be aliasing distortion that can not be separated from the music.





Tony Lauck

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


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