Re: 16-channel recording w/ LAYLA, ALSA, JACK, ARDOUR

[Lee Revell <rlrevell@joe-job.com>]

On Wed, 2006-04-12 at 16:18 -0400, Lee Revell wrote:
> On Wed, 2006-04-12 at 13:09 -0700, Lance Blisters wrote:
> > I bought a Layla24 and Cardbus adaptor.  Works beatifully with ALSA/JACK/ARDOUR up to 8 channels.  However, the soundcard presents the 8 analog channels as device 0 and 8 digital channels as device 1.  JACK will only open one device at a time.  So in order to record 16 channels with Ardour, I apparently need to create a virtual ALSA device combining the two LAYLA subdevices.
> > 
> > Has anyone solved this problem for this device?  I know ".asoundrc" and 
> > "multi" and company, but that is far from a complete answer - what
> > I really need is an actual functional .asoundrc.
> > 
> > Please CC me, as I had to drop off the list about five years ago due to
> > bandwidth limitations.
> 
> Maybe someone can explain why this .asoundrc does not work, AFAICT it
> should.  The error is:
> 
> ALSA lib conf.c:1592:(snd_config_load1)_toplevel_:606:27:Unexpected char
> ALSA lib conf.c:2837:(snd_config_hook_load)/root/.asoundrc may be old or
> corrupted consider to remove or fix it
> 
> Character 27 is either the '1' or the newline.
> 
> The analog device is "hw:0,0" and digital "hw:0,1", right?
> 
> # .asoundrc for layla 
> #
> # Create virtual devices out of multipls subdevices
> # JACK will need MMAP_COMPLEX support to use this. 
> 
> pcm.multi_capture {
> 	type multi
> 	slaves.a.pcm hw:0,0
> 	slaves.a.channels 8
> 	slaves.b.pcm hw:0,1
> 	slaves.b.channels 8
> 

Can you try replacing "slaves.a.pcm hw:0,0" with:

slaves.a.pcm {
	type hw;
	card 0;
	device 0;
}

etc. ?

> # First 8 channels of first soundcard (capture)
> 	bindings.0.slave a
> 	bindings.0.channel 0
> 	bindings.1.slave a
> 	bindings.1.channel 1
> 	bindings.2.slave a
> 	bindings.2.channel 2
> 	bindings.3.slave a
> 	bindings.3.channel 3
> 	bindings.4.slave a
> 	bindings.4.channel 4
> 	bindings.5.slave a
> 	bindings.5.channel 5
> 	bindings.6.slave a
> 	bindings.6.channel 6
> 	bindings.7.slave a
> 	bindings.7.channel 7
>     
> # First 8 channels of second soundcard (capture)
> 	bindings.8.slave b
> 	bindings.8.channel 0
> 	bindings.9.slave b
> 	bindings.9.channel 1
> 	bindings.10.slave b
> 	bindings.10.channel 2
> 	bindings.11.slave b
> 	bindings.11.channel 3
> 	bindings.12.slave b
> 	bindings.12.channel 4
> 	bindings.13.slave b
> 	bindings.13.channel 5
> 	bindings.14.slave b
> 	bindings.14.channel 6
> 	bindings.15.slave b
> 	bindings.15.channel 7
> 
> }
> 
> ctl.multi_capture {
> 	type hw
> 	card 0
> }
> 
> pcm.multi_playback {
> 	type multi
> 	slaves.a.pcm hw:0,0
> 	slaves.a.channels 8
> 	slaves.b.pcm hw:0,1
> 	slaves.b.channels 8
> 
> # First 8 channels of first soundcard (playback)
> 	bindings.0.slave a
> 	bindings.0.channel 0
> 	bindings.1.slave a
> 	bindings.1.channel 1
> 	bindings.2.slave a
> 	bindings.2.channel 2
> 	bindings.3.slave a
> 	bindings.3.channel 3
> 	bindings.4.slave a
> 	bindings.4.channel 4
> 	bindings.5.slave a
> 	bindings.5.channel 5
> 	bindings.6.slave a
> 	bindings.6.channel 6
> 	bindings.7.slave a
> 	bindings.7.channel 7
> 
> # First 8 channels of second soundcard (playback)
> 	bindings.8.slave b
> 	bindings.8.channel 0
> 	bindings.9.slave b
> 	bindings.9.channel 1
> 	bindings.10.slave b
> 	bindings.10.channel 2
> 	bindings.11.slave b
> 	bindings.11.channel 3
> 	bindings.12.slave b
> 	bindings.12.channel 4
> 	bindings.13.slave b
> 	bindings.13.channel 5
> 	bindings.14.slave b
> 	bindings.14.channel 6
> 	bindings.15.slave b
> 	bindings.15.channel 7
> 
> }
> 
> ctl.multi_playback {
> 	type hw
> 	card 0
> }
> 
> 
> 
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by xPML, a groundbreaking scripting language
> that extends applications into web and mobile media. Attend the live webcast
> and join the prime developer group breaking into this new coding territory!
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/alsa-devel
> 



-------------------------------------------------------
This SF.Net email is sponsored by xPML, a groundbreaking scripting language
that extends applications into web and mobile media. Attend the live webcast
and join the prime developer group breaking into this new coding territory!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642