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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: Re: is that so? posted by rps on May 15, 2005 at 14:43:11:
http://www.tnt-audio.com/clinica/diginterf1_e.htmlon TNT-audio. The author is DAC designer, and he's not trying to sell you anything. The whole thing has 5 parts, read at least this one, and, more importantly, the next which takes about different designs in terms of master-slave, in consumer audio (vs pro audio).
So apparently there *are* some benefits in having master clock sitting in a DAC in home audio, the major reason is that there is too many things going on in transport which possibly affects the quality of transmitted signal (and in the regular, non I2S type of connection a clocking information is embedded into the data). Yet apparently having DAC acting as a master clock introduces its own problems that must be solved. He talks about Wadia. Also he talks about Linn which apparently does something yet more complicated, like transport and DAC part constantly talk to each other back and forth. He also discusses I2S as a clean way to use transport as a master, since the clocking information goes throught the separate wire and there is less potential for its distortions. Makes interesting reading. He mentions that Philips had a patent on I2S, but recently that patent got expired and I2S is now in public domain.
But back to having the DAC acting as a master clock, apparently there are some special considerations involved, and without proper design there are side-effects. Frankly, if there *is* a magic bullet, I think it's I2S and high-quality clock on transport.
But once again, Pro Audio normally uses separate master clock which gets distributed to multiple slaves. I think dCS has something like that, with respect to high-end home audio.
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Follow Ups
- a nice article to read is ... - porky_pig_jr 17:25:49 05/15/05 (1)
- Re: a nice article to read is ... - rps 17:38:47 05/15/05 (0)
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