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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: Depends on What Type.............. posted by knewton on July 16, 2014 at 12:59:03:
"I've unsuccessfully attempted to enlighten Todd on how ASRC can reduce playback jitter over the past few years now. Perhaps, you will have success, but somehow, I doubt it."
No, I've posted on this subject every few years after Todd makes his claim. Perhaps it will be necessary to work out a simple example of why ASRCs work in theory.
How well ASRCs work in practice is a different question, and there I tend to agree with Todd's subjective comments. For that matter, I've yet to see a commercial SRC (SRC, not ASRC) that will upsample and downsample back to the original format and demonstrate that the Sampling Theorem works to a high level of accuracy, as measured by a deep null. Residual errors at -75 dB or worse tend to be typical, even when tested on sine waves that don't come close to the Nyquist frequency. (My metric is the L-infinity norm, i.e. largest absolute value of the error signal.)
Some audiophiles have complained that changing the low order bit of samples of a 24 bit sound file "completely trashed" the sound. How this can possibly be is a related subject.
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: Depends on What Type.............. - Tony Lauck 07/16/1414:07:04 07/16/14 (1)
- Moot Point........ - Todd Krieger 17:33:05 07/16/14 (0)
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