RE: Jitter is often expressed as a percentage of clock period ...

RE: Jitter is often expressed as a percentage of clock period ..."

Steve, I believe we are in agreement. Let me put it a different way as it may make it clearer to some others.

Unless there's noise shaping, jitter depends on the high frequency content of the music, not the sampling rate. So long as the sampling rate is high enough to capture essentially all the audio content, going to a higher sampling rate isn't going to affect jitter. This is most obvious when looking at a DC (constant) signal, where there will be no effect of jitter whatsoever in the absence of noise shaping. If there is noise shaping, then jitter will appear as a form of noise modulation. Expressing jitter as a percentage of clock rate may be of interest to a communications engineer as it relates to the eye pattern and may affect bit error rate. However, for music reproduction this measure is irrelevant. What matters is the effect of jitter on the analog output of the DAC, which appears as phase modulation of the audio signal and is largely independent of the sampling rate.

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 Full Thread

Topic - Jitter vs sampling rate. - sbrians 12:47:26 07/27/12 (22)

RE: Jitter vs sampling rate. - 13th Duke of Wymbourne 17:55:26 07/31/12 (0)

These threads are awesome... - Tromatic 16:56:28 07/30/12 (10)

RE: These threads are awesome... - Todd Krieger 09:42:29 08/01/12 (8)

I don't think that makes any sense - bwb 14:03:34 08/02/12 (0)

Can that be done? - sbrians 12:55:53 08/01/12 (6)

Not Completely...... But........... - Todd Krieger 15:40:43 08/01/12 (5)

Actually... - audioengr 10:57:59 08/02/12 (4)

you're making a joke right? /nt - bwb 14:08:03 08/02/12 (3)

RE: you're making a joke right? /nt - Tony Lauck 21:29:53 08/02/12 (2)

RE: you're making a joke right? /nt - Crazy Dave 10:34:41 08/03/12 (0)

unfortunately we live in the real world - bwb 08:47:38 08/03/12 (0)

it is not really "something as fundamental as jitter" - bwb 06:49:18 07/31/12 (0)

RE: Jitter vs sampling rate. - Gordon Rankin 08:08:16 07/30/12 (7)

RE: Jitter vs sampling rate. - audioengr 10:20:58 07/30/12 (6)

Jitter is often expressed as a percentage of clock period ... - slider 11:27:25 07/30/12 (5)

RE: Jitter is often expressed as a percentage of clock period ... - audioengr 14:00:20 07/30/12 (4)

RE: Jitter is often expressed as a percentage of clock period ... - Tony Lauck 17:35:14 07/30/12 (2)

Remember - Gordon Rankin 07:28:12 07/31/12 (1)

RE: Remember - Tony Lauck 07:42:26 07/31/12 (0)

Agreed ... to an extent - slider 16:25:57 07/30/12 (0)

RE: Jitter vs sampling rate. - audioengr 10:39:58 07/28/12 (1)

RE: Jitter vs sampling rate. - Bromo33333 17:56:33 07/28/12 (0)

Follow Ups

RE: Jitter is often expressed as a percentage of clock period ... - Tony Lauck 17:35:14 07/30/12 (2)

Remember - Gordon Rankin 07:28:12 07/31/12 (1)

RE: Remember - Tony Lauck 07:42:26 07/31/12 (0)

RE: Jitter is often expressed as a percentage of clock period ...

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