[LAU] ALSA: always use samplerate_best

[Grant]

>> I've added the following to /etc/asound.conf:
>>
>> defaults.pcm.rate_converter "samplerate_best"
>>
>> Should that do it?
>
> Yes.  (If that converter is installed.)
>
>> How can I verify that it's working?
>
> Run aplay with -v:
>
>   $ aplay -v something.wav
>   Playing WAVE 'something.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
>   Plug PCM: Rate conversion PCM (48000, sformat=S32_LE)
>   Converter: libspeex (builtin)
>   Protocol version: 10002
>   Its setup is:
>     ...


Thank you Clemens, I just needed to install alsa-utils (with
USE=libsamplerate) on Gentoo.

- Grant