Re: [linux-audio-user] Multiple Cards(sorry, i know it's an ancient topic)

On May 24, 2006, at 8:32 AM, Rick Wright wrote:

> paul santa clara wrote:
>
>> Hi everyone,
>> I am attempting to utilize my asound.conf to create a virtual
>> interface out of two delta 410 cards. There are several examples
>> of this online, but even after digesting them and plunging into
>> the ALSA doxygen docs, i am still unable to make jackd happy.
>> My understanding is that a route plug is inefficient but
>> necessary for jack to lock down the memory(unless the
>> MMAP_COMPLEX patch is applied). Using jack 0.99.0
>>
>> jackd -v -d alsa -P ttable_play results in the error...
>> ALSA lib pcm_multi.c:970:(_snd_pcm_multi_open) Unknown field 10
>> ALSA: Cannot open PCM device alsa_pcm for playback. Falling back
>> to capture-only mode.
>>
>> The playback portion of my asound.conf follows. Any help would
>> be greatly appreciated. I actually thought I understood the
>> configuration process until it failed to work. ;)
>>
>> thanks in advance,
>> -paul
>>
>> pcm.multi_playback {
>> type multi
>> slaves.a.pcm hw:1 <----------------------
>> "hw:0"?
>> slaves.a.pcm channels 10
>> slaves.b.pcm hw:2 <----------------------
>> "hw:1"?
>> slaves.b.pcm channels 10
>> #note that ice1217 chip actually has 10 outs(8 analogue on 410)
>
> I don't know much about .asoundrc configuration, but should the
> "hw" index start at 0?

Yeppers, but AlSA defines card 0 to be my main board's built in audio.
card 0 -> CK8S
card 1 -> M410
card 2 -> M410

thanks,
-paul
Received on Wed May 24 20:15:08 2006