14 Dec
2021
14 Dec
'21
12:43 p.m.
Dear group,
I would like to use alsaplayer via jack to play 3-channel audio files. These audio files
will be routed into a real-time capable signal processing platform the open master hearing
aid (openMHA). However, I cannot route the third channel to jack. I try to start
alsaplayer as a daemon with the following command
alsaplayer -i daemon -s PHL -o jack -d MHA:in_1,MHA:in_2,MHA:in_3 -F 16000
However alsaplayer returns and error saying
cannot connect output port 2 (MHA:in_2,MHA:in_3)
Actually MHA:in_2 should be the output port 2 and MHA:in_3 is ment to be the output port
3.
I first start the openMHA software so that it establishes 4 input and 4 output connections
via jack with the sound hardware. I can see the connections on qjackctl connections
window.
I have a sound card that has 8 input and output channels and the openMHA is configured to
expect 4 input channels and produces 2 output channels and already mentioned. So, the
problem is neither on the MHA side nor on the hardware. I am afraid that I cannot
configure the alsaplayer correctly that it expects three (or more) output ports. I would
appreciate any help from your side. Thank you in advance.
Best regards,
Kamil
14 Dec
14 Dec
1:14 p.m.
Dear Kamil,
On 14.12.21 11:43, Kamil Adiloglu wrote:
Dear group,
I would like to use alsaplayer via jack to play 3-channel audio files.
These audio files will be routed into a real-time capable signal
processing platform the open master hearing aid (openMHA). However, I
cannot route the third channel to jack. I try to start alsaplayer as a
daemon with the following command
alsaplayer -i daemon -s PHL -o jack -d MHA:in_1,MHA:in_2,MHA:in_3 -F 16000
for this use case I would like to suggest to use a native jack command
line player. There are several options available, e.g., jackplayrec or
tascar_jackio (both published by the same company as openMHA), or
jack-play from jacktools.
Example with tascar_jackio:
tascar_jackio soundfile.wav MHA:in_{1,2,3}
(the {1,2,3} is shell expansion, you might to write it explicitly).
Best regards,
Giso
However alsaplayer returns and error saying
cannot connect output port 2 (MHA:in_2,MHA:in_3)
Actually MHA:in_2 should be the output port 2 and MHA:in_3 is ment to be
the output port 3.
I first start the openMHA software so that it establishes 4 input and 4
output connections via jack with the sound hardware. I can see the
connections on qjackctl connections window.
I have a sound card that has 8 input and output channels and the openMHA
is configured to expect 4 input channels and produces 2 output channels
and already mentioned. So, the problem is neither on the MHA side nor on
the hardware. I am afraid that I cannot configure the alsaplayer
correctly that it expects three (or more) output ports. I would
appreciate any help from your side. Thank you in advance.
Best regards,
Kamil
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2:39 p.m.
Kamil Adiloglu <kamil.adiloglu(a)gmail.com> writes:
Dear group,
I would like to use alsaplayer via jack to play 3-channel audio
files. These audio files will be routed into a real-time capable
signal processing platform the open master hearing aid
(openMHA). However, I cannot route the third channel to jack. I try to
start alsaplayer as a daemon with the following command
alsaplayer -i daemon -s PHL -o jack -d MHA:in_1,MHA:in_2,MHA:in_3 -F 16000
However alsaplayer returns and error saying
cannot connect output port 2 (MHA:in_2,MHA:in_3)
Actually MHA:in_2 should be the output port 2 and MHA:in_3 is ment to
be the output port 3.
The current manual page at
<https://github.com/alsaplayer/alsaplayer/blob/master/alsaplayer.1.in>
does not suggest that more than 2 channels are a thing with alsaplayer.
It even has separate options for specifying the left and the right
channel in its configuration file.
You can try logic by analogy (as you did with your command line option)
and set a jack.output3 option in ~/.alsaplayer/config but I would be
very very much surprised if this option were recognised or even heeded.
Try a feature request.
--
David Kastrup
3:53 p.m.
On Tue, December 14, 2021 4:43 am, Kamil Adiloglu wrote:
I would like to use alsaplayer via jack to play
3-channel audio files.
The source code has a TODO file which has not been updated since 2011.
That file contains this item in the to-do list:
User request:
-------------
Add support for multi-channel audio files.
This will probably require substantial rewriting.
Some voluteer? If so, add you in the TODO list.
It would appear that alsaplayer does not support multi-channel audio files
(and I assume in this context it really means files with more than two
channels).
--
Chris Caudle
15 Dec
15 Dec
9:03 a.m.
Thank you Chris, David, Giso,
it is disappointing in my case but good to know that alsaplayer does not support
multi-channel (3 or more channels) audio playback.I also contacted the developers. Maybe
these emails would motivate them to implement this feature in near future ;).
Best,
Kamil
On 14. Dec 2021, at 14:52, Chris Caudle
<6807.chris(a)pop.powweb.com> wrote:
On Tue, December 14, 2021 4:43 am, Kamil Adiloglu wrote:
I would like to use alsaplayer via jack to play
3-channel audio files.
The source code has a TODO file which has not been updated since 2011.
That file contains this item in the to-do list:
User request:
-------------
Add support for multi-channel audio files.
This will probably require substantial rewriting.
Some voluteer? If so, add you in the TODO list.
It would appear that alsaplayer does not support multi-channel audio files
(and I assume in this context it really means files with more than two
channels).
--
Chris Caudle
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Linux-audio-user(a)lists.linuxaudio.org
https://lists.linuxaudio.org/listinfo/linux-audio-user 
6:25 p.m.
On Wed, Dec 15, 2021 at 12:04 AM Kamil Adiloglu
<kamil.adiloglu(a)gmail.com> wrote:
Thank you Chris, David, Giso,
it is disappointing in my case but good to know that alsaplayer does not support
multi-channel (3 or more channels) audio playback.I also contacted the developers. Maybe
these emails would motivate them to implement this feature in near future ;).
alsaplayer is an ancient, essentially dead player.
there are dozens (maybe even hundreds) or choices for media playback.
the right choice depends on precisely what you're doing.
to be honest, it's not clear to me how or why you even discovered
alsaplayer or thought it was the correct tool to use.
8:58 p.m.
On 12/14/21 2:43 AM, Kamil Adiloglu wrote:
Dear group,
I would like to use alsaplayer via jack to play 3-channel audio files.
These audio files will be routed into a real-time capable signal
processing platform the open master hearing aid (openMHA).
An option not mentioned yet in the thread is ecasound, I routinely use
it as a command line multi-channel player - it is a very good jack
client. Ecasound can do a LOT more than just playing back soundfiles.
-- Fernando
However, I
cannot route the third channel to jack. I try to start alsaplayer as a
daemon with the following command
alsaplayer -i daemon -s PHL -o jack -d MHA:in_1,MHA:in_2,MHA:in_3 -F 16000
However alsaplayer returns and error saying
cannot connect output port 2 (MHA:in_2,MHA:in_3)
Actually MHA:in_2 should be the output port 2 and MHA:in_3 is ment to be
the output port 3.
I first start the openMHA software so that it establishes 4 input and 4
output connections via jack with the sound hardware. I can see the
connections on qjackctl connections window.
I have a sound card that has 8 input and output channels and the openMHA
is configured to expect 4 input channels and produces 2 output channels
and already mentioned. So, the problem is neither on the MHA side nor on
the hardware. I am afraid that I cannot configure the alsaplayer
correctly that it expects three (or more) output ports. I would
appreciate any help from your side. Thank you in advance.
Best regards,
Kamil
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6 comments
6 participants
participants (6)
-
Chris Caudle -
David Kastrup -
Fernando Lopez-Lezcano -
Giso Grimm -
Kamil Adiloglu -
Paul Davis