Note how in the Wikipedia article, the word 'jitter' is placed within "bullsh*t marks" - punctuation which, when applied to any word or phrase being used to describe an audio phenomenon, means that the author is either clueless, or knows perfectly well that the words they're using are inaccurate. You'll see a lot of them on audio forums and the technical stuff on manufacturers' web sites.
Calling block addressing errors "jitter" was unfortunate - it leads to unnecessary confusion. Certainly it's not the same thing as jitter in the electronic engineering sense. I think you're confused about the different clocks in DAC and source. They always run at the same speed because they have to, otherwise you'd hear pops and clicks as the buffer in the DAC overruns or underruns. The device normally used to synchronise them is the PLL. Jitter is NOT to do with different clocks running at different speeds. It's irregularity in the one, single clock that drives the DAC. Imagine, for example, that you've bought a cheap wristwatch. It might gain a few seconds a day, but that's not jitter. Jitter is the fact that the seconds hand is stiff and jerky, and doesn't tick at precisely even one-second intervals. It is certainly possible for a DAC to buffer up enough data to cope with the difference in clock speeds over the length of a CD. It only requires about 1/2 a second's worth of buffer. The MSB DAC III does this - http://www.msbtech.com/products/dac3.php - for about $6,000. -- AndyC_772 ------------------------------------------------------------------------ AndyC_772's Profile: http://forums.slimdevices.com/member.php?userid=10472 View this thread: http://forums.slimdevices.com/showthread.php?t=35261 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
