Re: [linux-audio-dev] Please help: 16-channel recording w/ LAYLA, ALSA, JACK, ARDOUR

On Tue, 2006-04-11 at 16:04 -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 and play back 16 channels with Ardour, I apparently need to create a virtual ALSA device combining the two LAYLA subdevices.
>

Does this work? (based on
http://www.sound-man.co.uk/linuxaudio/ice1712multi.html)

# .asoundrc for layla
#
# Create virtual devices out of multiple 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

# 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
}
Received on Wed Apr 12 16:15:02 2006