Computer Audio Asylum

RE: Jpp for DAC as Master (using 24/88.2) yields an additonal 4ps of Jitter

86.120.170.131

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One more reason I don't think your measures are that reliable is that you don't measure the analog outputs of the DAC directly; instead they go through an A/D process performed by the ESI card and then you compare the file played with the one resulted by recording the analog outs of the DAC (at least this is how I understood your measuring technique to be).

So you don't have a way to quantify the jitter at the analog outs of the DAC because there is also jitter from the A/D process performed by the soundcard.

Something like this I think will give much more accurate results if you are that hardcore in jitter measurements:

http://www.tek.com/products/oscilloscopes/dsa8200/ (20K US$)
http://www.tek.com/Measurement/applications/serial_data/jitter.html
http://www.tek.com/Measurement/applications/serial_data/jitter/recommended_test.html

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