[time-nuts] Accuracy of a sound card

Matt Ettus boyscout at gmail.com
Mon Aug 22 17:29:28 EDT 2005

On 8/22/05, Tom Van Baak <tvb at leapsecond.com> wrote:
> I measured the phase, frequency and Allan deviation of
> the sound card on my cheap PC. You'll enjoy the results:
> http://www.leapsecond.com/pages/sound-1pps/
> If any of you with a high-end sound card want to repeat
> the experiment let me know.

All common soundcards have an oscillator that is either a multiple of
48 kHz or of 44.1 kHz.  They fake it for other sample rates.  It would
be interesting to see if the same experiment with a 48 kHz sample rate
produced different results.


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