Re: Two sound cards, only sound out of one

[Takashi Iwai <tiwai@suse.de>]

At Sun, 24 Aug 2003 12:13:53 +1000,
Erik de Castro Lopo wrote:
> 
> Hi all,
> 
> Using version 0.9.6 of alsa-*.
> 
> I have two ENS1371 based cards plugged into the one machine:
> 
>     root@sound:~# cat /proc/asound/cards
>     0 [AudioPCI       ]: ENS1371 - Ensoniq AudioPCI
>                          Ensoniq AudioPCI ENS1371 at 0xa400, irq 10
>     1 [AudioPCI_1     ]: ENS1371 - Ensoniq AudioPCI
>                          Ensoniq AudioPCI ENS1371 at 0x9400, irq 5
> 
> I have also set up a /etc/asound.conf file containing aliases for the
> cards named "card0" and "card1".
> 
> I have also run alsamixergui with "-c 0" and "-c 1" parameters to set up
> output volumes on the two cards (and the controls on the two alsamixergui
> instances behave independantly).
> 
> However, when I playback a sound file using:
> 
>     aplay -D card0 a.wav
>     aplay -D card1 a.wav
> 
> Only card0 produces sound. I have also tried physically swapping the cards
> but only card0 produces sound. I have also tried the -v option to aplay to
> confirm that the output is going to device 0 and device 1.

if aplay -vv shows the correct configuration and VU meters, i'd
suspect it's a hardware issue.  i.e. mixer mutes or physical
connection.  to check the card's playback without physical connection,
you can record via loopback like the following procedure:

1. choose "Mix" as the capture source.
2. turn on "Capture" switch.
3. raise "Capture" volume.
4. adjust "PCM" and "Master" volumees and switches.
5. play a file and record at the same time.
6. check the recorded file

also, you can try to swap the card order,

	options snd-ens1371 index=1,0


Takashi


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