[alsa-devel] em8300 and ALSA problems

[Jan Willies]

Takashi Iwai wrote:
> At Mon, 04 Feb 2008 16:46:44 +0100,
> Jan Willies wrote:
>> Takashi Iwai wrote:
>>> At Mon, 04 Feb 2008 16:32:29 +0100,
>>> Jan Willies wrote:
>>>> [root at server ~]# alsaplayer --verbose -o alsa -d hw:1,0 Strong.mp3 
>>>> AlsaPlayer 0.99.80
>>>> (C) 1999-2004 Andy Lo A Foe <andy at alsaplayer.org> and others.
>>>> Output plugin: ALSA output v1.9.0beta12
>>>> error on set_format SND_PCM_FORMAT_S16
>>>> Unavailable hw params:
>>>> ACCESS:  RW_INTERLEAVED
>>>> FORMAT:  S16_BE
>>> The device is supposed to be big-endian only.  Try plughw:1,0
>>> instead to convert endianness.
>> Yes, that seems to work! Only for analog output though. When I try with digital I get the same error again.
>>
>> [jan at server ~]$ cat /proc/asound/devices 
>>   0: [ 0]   : control
>>   1:        : sequencer
>>  16: [ 0- 0]: digital audio playback
>>  24: [ 0- 0]: digital audio capture
>>  25: [ 0- 1]: digital audio capture
>>  32: [ 1]   : control
>>  33:        : timer
>>  48: [ 1- 0]: digital audio playback
>>  49: [ 1- 1]: digital audio playback
>>
>> [root at server ~]# alsaplayer --verbose -o alsa -d plughw:1,1 Strong.mp3 
>> AlsaPlayer 0.99.80
>> (C) 1999-2004 Andy Lo A Foe <andy at alsaplayer.org> and others.
>> Output plugin: ALSA output v1.9.0beta12
>> error on set_format SND_PCM_FORMAT_S16
>> Unavailable hw params:
>> ACCESS:  RW_INTERLEAVED
>> FORMAT:  IEC958_SUBFRAME_BE
>> [...]
> 
> The plug plugin doesn't handle the automatic conversion of
> IEC958-subframe formats.  You'll likely need to create a PCM
> configuration to use iec958 plugin properly (better as a card-specific
> config stored in /usr/share/alsa/cards).  Some config files there
> already use iec958 plugin, such as ATIIXP-SPDMA.conf.

There is already a /usr/share/alsa/cards/EM8300.conf with EM8300.pcm.iec958.0 {...} (http://pastebin.ca/raw/891351) from Ville Skyttä but I don't know how to use it. Neither how to create a PCM configuration for the iec958 plugin. I guess I'll wait for some dxr3 devs to join the party :-)

Thanks for your help.


- Jan