7 Oct
2009
7 Oct
'09
11:58 a.m.
Hi all -
I use an M-Audio FastTrack Pro (USB soundcard) and it's nice - works
smoothly with jack - except that it has four audio outputs, presented
split into separate devices:
* Device hw1:0 has the first two outputs
* Device hw1:1 has the second two outputs and the two inputs
Jack will only connect to one of the two devices for output, so I
can't get four-channel output from my jack apps.
This thread
<http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23839.html>
suggests that using .asoundrc to aggregate the two devices into one
virtual device should work, but for me it simply doesn't, the virtual
device never shows up in qjackctl and even jackd from commandline
can't connect to it by name.
Has anyone experienced anything similar, and/or have any suggestions?
Crazy workarounds welcome.
Thanks
Dan
--
http://www.mcld.co.uk
7 Oct
7 Oct
12:17 p.m.
On Wed, Oct 7, 2009 at 9:58 AM, Dan S <danstowell+lxau(a)gmail.com> wrote:
This thread
<http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23839.html>
suggests that using .asoundrc to aggregate the two devices into one
virtual device should work, but for me it simply doesn't, the virtual
device never shows up in qjackctl and even jackd from commandline
can't connect to it by name.
can aplay? if not, start there.
9 Oct
9 Oct
6:06 a.m.
2009/10/7 Paul Davis <paul(a)linuxaudiosystems.com>om>:
On Wed, Oct 7, 2009 at 9:58 AM, Dan S
<danstowell+lxau(a)gmail.com> wrote:
Forgive the ignorance but what sort of string does aplay's "-d" option
need? I tried the device names that qjackctl shows me (namely default,
hw:0, hw:1,0, hw:1) and only "default" worked (I expected hw:0 also to
work since that's the same as default, i.e. the internal card). All
other options return immediately with error and don't play.
Here's what aplay -l gives:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC861VD Analog [ALC861VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0
I tried various device names like "Intel", "HDA Intel",
"Pro",
"FastTrack Pro", "USB Audio" and they all give the answer
"unknown
PCM". Device names "hw" "hw:0" "hw:1"
"hw:1,0" give this:
Playing WAVE 'a11wlk01.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
aplay: set_params:909: Channels count non available
If I use the device name "multi" (the name I specified for the virtual
device) I get
ALSA lib pcm_multi.c:1169:(_snd_pcm_multi_open) Invalid or missing
schannel for channel 3
aplay: main:550: audio open error: Invalid argument
Grateful for any suggestions -
Thanks
Dan
This thread
<http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23839.html>
suggests that using .asoundrc to aggregate the two devices into one
virtual device should work, but for me it simply doesn't, the virtual
device never shows up in qjackctl and even jackd from commandline
can't connect to it by name.
can aplay? if not, start there. 
6:09 a.m.
On 10/09/2009 07:06 PM, Dan S wrote:
2009/10/7 Paul
Davis<paul(a)linuxaudiosystems.com>om>:
aplay -f cd -d hw:1,0 xxxx.wav
That should record a cd quality wav file on the fastrack pro i/o 1/2
On Wed, Oct 7, 2009 at 9:58 AM, Dan
S<danstowell+lxau(a)gmail.com> wrote:
Forgive the ignorance but what sort of string does aplay's
"-d" option
need? I tried the device names that qjackctl shows me (namely default,
hw:0, hw:1,0, hw:1) and only "default" worked (I expected hw:0 also to
work since that's the same as default, i.e. the internal card). All
other options return immediately with error and don't play.
This
thread<http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23…
suggests that using .asoundrc to aggregate the two devices into one
virtual device should work, but for me it simply doesn't, the virtual
device never shows up in qjackctl and even jackd from commandline
can't connect to it by name.
can aplay? if not, start there.
Here's what aplay -l gives:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC861VD Analog [ALC861VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0
I tried various device names like "Intel", "HDA Intel",
"Pro",
"FastTrack Pro", "USB Audio" and they all give the answer
"unknown
PCM". Device names "hw" "hw:0" "hw:1"
"hw:1,0" give this:
Playing WAVE 'a11wlk01.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
aplay: set_params:909: Channels count non available
If I use the device name "multi" (the name I specified for the virtual
device) I get
ALSA lib pcm_multi.c:1169:(_snd_pcm_multi_open) Invalid or missing
schannel for channel 3
aplay: main:550: audio open error: Invalid argument
Grateful for any suggestions -
Thanks
Dan
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Linux-audio-user(a)lists.linuxaudio.org
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4:54 p.m.
2009/10/9 Patrick Shirkey <pshirkey(a)boosthardware.com>om>:
On 10/09/2009 07:06 PM, Dan S wrote:
Hmm, no dice here (you mean "play" not "record" I guess). In the
following, all of the playback commands occurred on the internal
device:
sounds> aplay --version
aplay: version 1.0.13 by Jaroslav Kysela <perex(a)suse.cz>
sounds> aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC861VD Analog [ALC861VD Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Pro [FastTrack Pro], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0
sounds> aplay a11wlk01.wav
Playing WAVE 'a11wlk01.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
sounds> aplay -f cd -d hw:1,0 a11wlk01.wav
Playing WAVE 'a11wlk01.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
sounds> aplay -f cd -d hw:1,1 a11wlk01.wav
Playing WAVE 'a11wlk01.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
sounds> aplay -f cd -d hw:0,0 a11wlk01.wav
Playing WAVE 'a11wlk01.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
How to diagnose?
Thanks
Dan
2009/10/7 Paul Davis<paul(a)linuxaudiosystems.com>om>:
aplay -f cd -d hw:1,0 xxxx.wav
That should record a cd quality wav file on the fastrack pro i/o 1/2
On Wed, Oct 7, 2009 at 9:58 AM, Dan S<danstowell+lxau(a)gmail.com> wrote:
Forgive the ignorance but what sort of string does aplay's "-d" option
need? I tried the device names that qjackctl shows me (namely default,
hw:0, hw:1,0, hw:1) and only "default" worked (I expected hw:0 also to
work since that's the same as default, i.e. the internal card). All
other options return immediately with error and don't play.
This
thread<http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23…
suggests that using .asoundrc to aggregate the two devices into one
virtual device should work, but for me it simply doesn't, the virtual
device never shows up in qjackctl and even jackd from commandline
can't connect to it by name.
can aplay? if not, start there.
5568
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days old
linux-audio-user@lists.linuxaudio.org
4 comments
3 participants
participants (3)
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Dan S -
Patrick Shirkey -
Paul Davis