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A plague on both your houses

Jitter is a subject about which a lot of heat is generated, but not a lot of light. This discussion is a perfect example of this. In contrast to your comment lower down in the discussion, Christine, a lot of us are interested in jitter as it affects our players. However, all I’ve seen is a lot of assumptions thrown out on both sides as well as aspersions about intellectual character, and almost no science. So how about a few questions? Some of these have already been asked, but none of the have been answered.

1) Why should we care? Jitter seems to be the THD of the 21st century. Is a 100ps difference audible and if so, where’s the proof? I know different players sound different but has anyone demonstrated that 100 ps of jitter can actually be heard when all other variables have been kept constant.

2) Why do different measuring systems for jitter give such widely differing results? A Picosecond is certainly not dimensionless.

3) Who says 20 ps is audible? What measuring system did they use? Is it the same measuring system used in the results cited by Christine?

4) What are the components that affect jitter? Obviously it has to be more that the transport, as different players with the same transport, have widely varying jitter results. Can jitter induced by a particular component have a greater or lesser affect than jitter induced by another component or is all jitter the same?

Guys, I don’t have a dog in this hunt. But this is a subject I am interested in and this discussion has not helped a lot. Where I come from, when geophysicists have a scientific discussion, they supply data and cite references. They also write in a dispassionate manner. I’d appreciate the same.


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