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Clock accuracy on PC and Mac? What is the usual PPM error rate for users? Can it be improved?


sastusbulbas
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  • 3 weeks later...

Clock accuracy or PPM rates are unimportant really, as long as it's not so far off that the DAC cannot lock on. It's jitter that is important. This is the edge-to-edge variability in the period of the clock. Very highly accurate clocks can also have high jitter.

 

Steve N.

Empirical Audio

 

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"and isn't a deviation from a frequency a more concrete problem than jitter?"

 

No, most DAC's can tolerate wide variation in absolute frequency and still operate perfectly. Jitter is another matter. It causes distortion in the analog outputs.

 

Steve N.

 

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