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Music servers and other computer based digital audio technologies.

RE: Thanks for the review, & postings: question

PHY chips do signal processing to make sense out of the incoming waveform. The amount of processing required depends on the quality of the waveform, which will vary depending on the source and the cabling. With a very high quality input signal, little or no signal processing will be required, just sampling the waveform at the appropriate times and looking at the values to slice the amplitude into 1's and 0's. With a low quality waveform there will have to be additional processing to make sense out of the waveform before it can be sliced and diced into the bits.

Signal processing takes energy, and using this energy creates noise. This is an inevitable byproduct of the processing. The cure is not "unobtainium" PHY chips, it is additional isolation. It is possible to isolate the PHY chip from the critical portions of the DAC (clock, and analog circuitry), but if this is inadequate then the problem is with the lack of isolation, not the PHY itself. Alternatively, and this is what the REGEN does, the cure is to feed a cleaner USB signal to the PHY chip, so it has less work to do.


Tony Lauck

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


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