two soundcards as one, for recording?

two soundcards as one, for recording?

[Tommi Sakari Uimonen]

Hi. I have M-Audio Delta 1010LT and Audiophile 2496 cards, running
2.6.0-test4. I tested the asoundrc magic described in

http://article.gmane.org/gmane.linux.alsa.devel/1946/match=asoundrc+soundcards

but without any success. Got the following error:

arecord: set_params:787: Broken configuration for this PCM: no
configurations available

I can record from both (not at the same time of course) with 'arecord -D
default:0 -c 8 [...]' (for 1010LT) and 'arecord -D default:1 -c 2 [...]'
(for 2496), so the cards and their configuration work ok.

I was hoping to get 10 channel recording done with these two cards. They
sync together through SPDIF, so no drifting should occur. And if possible,
get 12 channels by adding the free SPDIF input as one stereo source to the
combination.

(1010LT has 8 analog inputs, 2496 has two)

The solution would be if arecord worked with JACK, but since I can't
find any information on that, I'll have to live without.


Any ideas?

Tommi Uimonen


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Re: two soundcards as one, for recording?

[Takashi Iwai]

At Tue, 26 Aug 2003 18:44:22 +0300 (EEST),
Tommi Sakari Uimonen wrote:
> 
> Hi. I have M-Audio Delta 1010LT and Audiophile 2496 cards, running
> 2.6.0-test4. I tested the asoundrc magic described in
> 
> http://article.gmane.org/gmane.linux.alsa.devel/1946/match=asoundrc+soundcards
> 
> but without any success. Got the following error:
> 
> arecord: set_params:787: Broken configuration for this PCM: no
> configurations available
> 
> I can record from both (not at the same time of course) with 'arecord -D
> default:0 -c 8 [...]' (for 1010LT) and 'arecord -D default:1 -c 2 [...]'
> (for 2496), so the cards and their configuration work ok.
> 
> I was hoping to get 10 channel recording done with these two cards. They
> sync together through SPDIF, so no drifting should occur. And if possible,
> get 12 channels by adding the free SPDIF input as one stereo source to the
> combination.
> 
> (1010LT has 8 analog inputs, 2496 has two)
> 
> The solution would be if arecord worked with JACK, but since I can't
> find any information on that, I'll have to live without.
> 
> 
> Any ideas?

IIRC, this is because of asymmetry of playback and capture channels on
ice1712 chip.  number of playback channels and capture channels are
different on this chip.
please check the mail archive, or google is your friend :)


Takashi


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