At Tue, 17 Feb 2004 21:14:02 -0300,
Leonardo S� wrote:
> 
> I've a 5.1 surround card (cmedia 8738) but i can't get output from the bass 
> (subwoofer) speaker.
> 
> $ aplay -Drear logout.wav
> Playing WAVE 'logout.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, 
> Stereo
> 
> $ aplay -Dfront logout.wav
> Playing WAVE 'logout.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, 
> Stereo
> 
> $ aplay -Dcenter_lfe logout.wav
> ALSA lib pcm.c:1787:(snd_pcm_open_conf) Invalid type for PCM center_lfe 
> definition (id: center_lfe, value: cards.pcm.center_lfe)
> aplay: main:484: audio open error: Invalid argument
> 
> only the center_lfe device is not working. Both center and rear can output 
> sound very well.
> 
> Someone can point me out what i've been doing wrong?

the card doesn't support the individual center/lfe channel.
it's always bound to 5.1 output.


Takashi


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