From: Alberto di Bene <[EMAIL PROTECTED]> Subject: [time-nuts] Re: Accuracy of a sound card Date: Tue, 23 Aug 2005 19:35:58 +0200 Message-ID: <[EMAIL PROTECTED]>
Alberto, > Just for the sake of curiosity and to end this topic, I measured the > accuracy of another sound card I have in my PC, a Terratec Aureon Sky. A > good card, but not of the same class of the Delta 44. But it was more > accurate... 40001.5 Hz which translates into an error of 37.5 +- 2.5 ppm Which sounds about right. I would not assume that those are much better than 50 ppm crystals normally. Expect those frequencies to be different at a later date since they probably vary with temperature, voltage rails and add oscillator aging to the mix. Personally I care more about the high frequency jitter than the exact sampling frequency and its slow drifting around in the neighborhood of correct sampling-rate. The time-nut in me would try to figure out a way to lock it, just because I can lock it one way or another. I am not sure that such an exercise would greatly improve the state of things thought. Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
