[alsa-devel] ASoC:Question rate constraint between the dais

Mark Brown broonie at opensource.wolfsonmicro.com
Mon Mar 19 17:32:39 CET 2012

On Mon, Mar 19, 2012 at 04:12:42PM +0000, James Courtier-Dutton wrote:

> A majority of the sound cards out there do 48KHz well, but not so well
> on other rates, so defaulting to 48KHz is probably the best choice.

This really isn't so true in the embedded space, there's a few systems
that only do 48kHz to the AP but generally if there's a fixed sample
rate it'll usually be 44.1kHz and otherwise the rates will be flexible.

> One of the most difficult things is getting 44.1KHz MP3s etc.
> resampled to 48KHz, but most MP3 playing apps support good resamplers
> so they can still talk to pulseaudio at 48KHz.

Again, not so true for embedded and burning power on resampling tends
not to make people happy.
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