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In Reply to: Re: clock path to the chips posted by Alex Peychev on September 21, 2006 at 16:35:14:
I haven't done all of the experiments to say definitively that Alex is wrong, but it would be safe to say that his opinions are outliers among the consensus of high-end digital designers and modifiers.At this point it is well accepted that jitter matters quite a bit with regards to digital sound quality. According to theory, there are only two places that jitter matter:
a) The clock that controls the conversion timing of the A/D converter.
b) The clock that controls the conversion timing of the D/A converter.
So for example, it shouldn't really matter when the audio data is loaded into the DAC chip. All that should matter is when that data is converted to analog. However, in the real world people have noted an audible improvement by re-clocking (reducing the jitter) of the audio data that is fed to the DAC chip.
If we look for mechanisms to explain this, a likely possibility is that of crosstalk and/or ground bounce between the data lines and the clock lines inside the DAC chip itself. However, most people's experience is that timing errors on the data lines are second-order effects compared to timing errors on the DAC's clock. Apparently Alex has had a different experience.
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- Re: clock path to the chips - Charles Hansen 19:32:22 09/21/06 (0)
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