In Reply to: RE: Thanks for the review, & postings: question posted by Sordidman on September 22, 2015 at 13:31:47:
As far as I am concerned, when a DAC is used with different input circuitry it is, for all practical purposes, a different DAC.
My comments in this thread were with respect to USB DACs, specifically those that operate asynchronously. (If a DAC receives audio timing information from the same "box" as its digital samples, as is the case with SPDIF and many AES/EBU configurations, then indeed, I would agree that the device sending clock and data is a transport, since then the partition of functions between the two boxes is conceptually similar to the traditional two box CD players or for that matter a two box tape deck with heads and mechanicals in on box and electronics in the other.)
For a DAC to pass noise on its digital input through to its analog output is similar to a DAC passing noise on its power input through to its analog output. In both cases, if this noise is excessive (relative to the price point of the DAC) then the DAC is not operating properly. Another possibility is electrical noise from nearby devices. (I've not experienced this with a DAC, but of course it is common with analog sources if equipment is not located properly.) Here, by "noise" I include subtle changes to the music as well as clearly separate background sound.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: Thanks for the review, & postings: question - Tony Lauck 09/23/1510:00:51 09/23/15 (0)