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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: Some kind questions about reclocking posted by beppe61 on January 27, 2015 at 01:16:30:
Hi !
sorry for the very trivial questions
I have a big confusion about clock in general and reclocking in particular
A dac can use 3 different clock:
1) the one embedded with the input digital signal
2) one internal
3) one taken from an external clock generator
If i have a dac with a internal quartz and no way to select the clock source i guess the dac always reclock the incoming digital signal, if not what would be the reason of the presence of a quartz inside ?
Am i right ?
Usually such an internal clock is there with the purpose of resampling the data to reduce jitter. This is a PLL type clock, so it is still affected by incoming signal jitter.
So in the end what should really matter is the quality of the dac's internal clock and not the quality of the incoming spdif signal.
Am i right again ?
They both matter.
Then the sound quality out of very good dacs should be quite independent from the quality of the spdif input because there will always be a "reclocking" of the digital signal in the dac.
In theory yes, but in practice it is not independent.
It is very important for me to understand this because it will free me to chose even a very cheap source and focus all the attention and allocate most of the budget to get a good dac.
Thanks a lot for any kind advice.
Kind regards,
bg
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Follow Ups
- RE: Some kind questions about reclocking - audioengr 19:05:42 01/29/15 (2)
- RE: Some kind questions about reclocking - beppe61 12:28:27 01/30/15 (1)
- RE: Some kind questions about reclocking - audioengr 09:35:37 01/31/15 (0)
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