On Sun, 3 Mar 2002, Samuel S Chessman wrote:
> I have been trying to get S16_LE format sound out of my ice1712 with
> poor success, and noted the example in
> http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html
> for setting up slaves. I added a format line to ~/.asoundrc thus:
>
> pcm.rate44100Hz {
> type plug
> slave {
> pcm "hw:0,0"
> rate 44100
> format "Unsigned 16 bit Little Endian"
> }
> }
>
> and received a failure;
> ALSA lib pcm.c:5504:(snd_pcm_slave_conf) unknown format
> snd_pcm_open: Invalid argument (rate44100Hz)
>
> Investigating the code led me to conclude that the snd_pcm_format_value()
> function should be looking up strings in snd_pcm_format_descriptions[]
> where they are defined instead of snd_pcm_format_names[] where they are not.
> It would also be helpful to print out the unknown format with the error.
>
> Perhaps I misunderstand but there is little documentation on format.
I've added the support for long format description as well. The
snd_pcm_format_names[] is perfectly ok - try 'U16_LE' or 'S16_LE'.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project http://www.alsa-project.org
SuSE Linux http://www.suse.com
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