linuxaudio.org

On 06/30/2012 09:22 AM, Carlo Ascani wrote:

quoted text
> Hi,

>

> I own a Layla24 [1] soundcard and an ada8000 [2] digital converter,

> they are linked with an optical cable (and a bnc for wc).

>

> Using echomixer I can see VU meters rising on digital inputs.

> Anyway, when I start jack I can use only the eight analog inputs.

>

> I start jackd with "jackd -d alsa -d hw:1 -r 44100"

> jackd version is  jackdmp 1.9.8

>

>

> Here is my "aplay -l":

>

> **** List of PLAYBACK Hardware Devices ****

> card 0: Layla20 [Layla20], device 0: Analog PCM [Layla20]

>   Subdevices: 10/10

>   Subdevice #0: subdevice #0

>   Subdevice #1: subdevice #1

>   Subdevice #2: subdevice #2

>   Subdevice #3: subdevice #3

>   Subdevice #4: subdevice #4

>   Subdevice #5: subdevice #5

>   Subdevice #6: subdevice #6

>   Subdevice #7: subdevice #7

>   Subdevice #8: subdevice #8

>   Subdevice #9: subdevice #9

> card 0: Layla20 [Layla20], device 1: Digital PCM [Layla20]

>   Subdevices: 2/2

>   Subdevice #0: subdevice #0

>   Subdevice #1: subdevice #1

> card 1: Layla24 [Layla24], device 0: Analog PCM [Layla24]

>   Subdevices: 8/8

>   Subdevice #0: subdevice #0

>   Subdevice #1: subdevice #1

>   Subdevice #2: subdevice #2

>   Subdevice #3: subdevice #3

>   Subdevice #4: subdevice #4

>   Subdevice #5: subdevice #5

>   Subdevice #6: subdevice #6

>   Subdevice #7: subdevice #7

> card 1: Layla24 [Layla24], device 1: Digital PCM [Layla24]

>   Subdevices: 8/8

>   Subdevice #0: subdevice #0

>   Subdevice #1: subdevice #1

>   Subdevice #2: subdevice #2

>   Subdevice #3: subdevice #3

>   Subdevice #4: subdevice #4

>   Subdevice #5: subdevice #5

>   Subdevice #6: subdevice #6

>   Subdevice #7: subdevice #7

>

> [1] http://www.echoaudio.com/Products/Discontinued/Layla24/index.php

> [2] http://www.behringer.com/en/Products/ADA8000.aspx

> 

Hi Carlo,
Apparently, the Layla shows up as two independent sound-cards.

jackd can only open one device at a time. So you will need to combine

those cards into one.
There are various way to achieve this. I suppose the appropriate

solution here would be to use pcm.multi.
see http://jackaudio.org/multiple_devices and

http://www.alsa-project.org/main/index.php/Asoundrc#Virtual_multi_channe...

and
HTH,

robin

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