Sin x/x wrote on Sun, 20 August 2006 11:42 |
Up sampling does not alter the amount of information in the signal.
So no extra detail. .
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No extra detail, however in most cases of D/A conversion there are upsampling stages in the digital domain to reduce to requirements of the analogue reconstruction filter.
This upsampling process will itself introduce errors, though with proper design they will be insignificant. It may be that in the case of cheaper DAC chips the built in SRC is of limited quality, and if you have some DSP power to spare in your system it may make sense to use that and bypass the SRC on the DAC, rather than upgrading to a better quality DAC (remember that in mass market audio consumer products they count pennies when it comes to production cost).
Sin x/x wrote on Sun, 20 August 2006 11:42 |
All descent converters use a phase locked loop, witch removes all jitter. .
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Well that would depend on the quality of your PLL, they are an exercise in compromise... which is why Dan came up with CrystalLock.
However the more I think about it, the less useful I can imagine this functionality being, because it doesn't actually make sense, it would only work if you were removing jitter in the original sample clock (which I would expect to be smaller than you could measure and compensate for) and not jitter in the transmission line. Otherwise you're actually going to be introducing distortion, not removing it.
Actually reading their white paper a bit more I think I may have misunderstood what they were suggesting, mostly because the repeated use of the word "jitter" is a red herring.
Sin x/x wrote on Sun, 20 August 2006 11:42 |
Snake oil.
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Well I's say more like moisturerizer being advertised as the secret to eternal youthful looks. It appears to be a sample rate converter, aimed very much at consumer playback equipment. It MAY be a good solution to meeting achieving a good cost/performance ratio in some cases.