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In Reply to: RE: DACs using SPDIF are broken by design posted by Tony Lauck on October 20, 2014 at 09:22:54
My comments about SPDIF stand. The design is defective and inappropriately cheap. The use of multiplexed clock and data creates jitter problems that would simply not exist with a dedicated clock line, "for example with I2S. Better is for the clock to originate at the DAC. This is an option with I2S. It is possible to build good implementations of a poor architecture that beat poor implementations of a good architecture.The complexity of USB (A camel is a horse designed by a committee.) makes implementations in DACs noisy unless extra cost is spent on power supplies and isolation. It also makes it likely that many implementations will be poor, if only because the designers attention span isn't long enough to take in the entire specification. (I found it very time consuming to get an answer to a simple question from the USB specification.)"
You are talking theory which is fine, but many are using UBS-SPDIF with positive results. Sometime it is hard to mix theory into practical discussions. Some do not differentiate the two.
You were just told by the streamer cognoscenti not to be discussing ADCs here... Get with the program Tony!!! :):)
Edits: 10/20/14 10/20/14Follow Ups:
The idea that spdif is broken arose from vendors of usb audio devices. It was repeated ad nauseam here by promoters of these devices who have never taken the trouble to provide proper impedance matching and who insisted on using a phono connector with poor spdif circuitry such as those used in computers with a web published passive signal line.
Some, including TL, just didn't seem to like Sony or Phillips - not invented here!
agree.
SPDIF may be "broken" in theory but not in application.
Philips and Sony brought us 44/16 instead of 48/16. That was (for decades) the death of high quality audio. This is why I don't like these companies. The battle was between the US on the one side vs. Europe/Japan on the other side. Mid-fi mentality won the day. This was about politics and greed vs. quality.
The idea that SPDIF was broken was publicized first by Julian Dunn. This was well before anybody was using USB for audio purposes. This was at least a decade before USB audio products hit the market.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
"Broken By Design" is a great name for a new audio company making digital components!!
You're full of Schiit. :-)
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Touche'!!!!
No point in discussing your obsession.But usb audio is also broken because you, I, others, and Gordon have discovered errors in transmission highlighted by 'software'?
When you slate something, it needs to be based on collective knowledge and experience, and not on dislike or a quote from someone like Julian Dunn who is highly mathematical and theoretical. His associates actually make and sell very good sounding aes3 or spdif products.
Edits: 10/21/14
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