linuxaudio.org

On Thu, Feb 14, 2013 at 9:03 PM, Ralf Mardorf

 wrote:

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

>> 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

Is this saying that a higher freq will result in lower latency? Guess

that makes sense since higher freq contains more data.
> Higher sample rate = more data at equal bit depth.
Guess there really is no reason not to use 48K then.
Thanks.
--

**** Listen to my CD at http://www.mellowood.ca/music/cedars ****

Bob van der Poel ** Wynndel, British Columbia, CANADA **

EMAIL: bob@mellowood.ca

WWW:   http://www.mellowood.ca

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