linuxaudio.org

On Thu, 2013-02-14 at 20:32 -0700, Bob van der Poel wrote:

quoted text
> Now, if I have an app like audacity set to 48K does it (or jack?) send

> a message to the box to enable 48 (or 44.1)? If that is the case, I

> assume that using 44.1 or 48 should have the identical latency issues?

> 48K should send a bit more data back to the computer?

All audio devices I know automatically are set to the sample rate set by

alsa, 'jackd -d alsa --help'.
No, the latency will differ for different sample rates:
512 samples / 44.1 kHz = 11.609977324 ms

11.609977324 * 2 = 23.219954649 ms ≈ 23.2 ms
512 samples / 48.0 kHz = 10.666666667 ms

10.666666667 * 2 = 21.333333334 ms ≈ 21.3 ms
Higher sample rate = more data at equal bit depth.
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