* Motu M4 - where to report this issue?
@ 2021-05-21 18:46 Georges Basile Stavracas Neto
0 siblings, 0 replies; 3+ messages in thread
From: Georges Basile Stavracas Neto @ 2021-05-21 18:46 UTC (permalink / raw)
To: alsa-devel
Greetings ALSA community,
I recently acquired a Motu M4 interface, and seems to be working
well so far. Everyday usage is completely functional.
However, I noticed an odd sound artifact that happens from time
to time when using DAWs like Ardour and Waveform11. It's a windy,
ghostly sound that happens whenever I open any DAWs (the simple
act of opening them triggers this). Interestingly, audio apps that
use PulseAudio do not suffer from this issue. It's hard to describe
it, so I recorded a video reproducing this problem:
https://youtu.be/bM8x-YuXLVI
A few things I've discovered while trying to understand what's
going on:
* It only happens with apps that use JACK or ALSA APIs. Using
PulseAudio (through PipeWire) does not trigger it.
* Seems like this sound is not an artifact of the interface; it
appears that this odd sound is sent to the interface through
USB. (You can see this in the video.)
* It's triggered per track; in the video, for example, the drums
and keyboard tracks are affected independetly.
I was oriented in #alsa at Freenode that the output of 'alsa-info'
might be helpful, so here it is:
http://alsa-project.org/db/?f=62f686710cc6c9344a8986707bf3d09248c514d1
(I'm running this on top of a 5.12.5 kernel, which should include
this fix: https://bugzilla.kernel.org/show_bug.cgi?id=207023)
I'd like to know where should I report this bug (kernel bugzilla?),
and if there's any other information I can provide to help fixing
it.
With respect,
Georges
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Motu M4 - where to report this issue?
2021-05-21 18:49 Georges Basile Stavracas Neto
@ 2021-05-21 20:12 ` Geraldo Nascimento
0 siblings, 0 replies; 3+ messages in thread
From: Geraldo Nascimento @ 2021-05-21 20:12 UTC (permalink / raw)
To: Georges Basile Stavracas Neto; +Cc: alsa-devel
On Fri, May 21, 2021 at 3:50 PM Georges Basile Stavracas Neto
<georges.stavracas@gmail.com> wrote:
>
> Greetings ALSA community,
Hey, Georges!
>
> I recently acquired a Motu M4 interface, and seems to be working
> well so far. Everyday usage is completely functional.
>
> However, I noticed an odd sound artifact that happens from time
> to time when using DAWs like Ardour and Waveform11. It's a windy,
> ghostly sound that happens whenever I open any DAWs (the simple
> act of opening them triggers this). Interestingly, audio apps that
> use PulseAudio do not suffer from this issue. It's hard to describe
> it, so I recorded a video reproducing this problem:
>
> https://youtu.be/bM8x-YuXLVI
>
> A few things I've discovered while trying to understand what's
> going on:
>
> * It only happens with apps that use JACK or ALSA APIs. Using
> PulseAudio (through PipeWire) does not trigger it.
I assume you are using PipeWire for JACK support and using "pw-jack
ardour" for example to start Ardour.
Could you stop PipeWire with "systemctl --user stop pipewire.service
pipewire.socket pipewire-media-session.service pipewire-pulse.service
pipewire-pulse.socket" and try to reproduce your issue using the
aplay/arecord commands?
Does the dmesg show anything unusual? Perhaps you should enable the
kernel boot option "snd_usb_audio.dyndbg=+p"
>
> * Seems like this sound is not an artifact of the interface; it
> appears that this odd sound is sent to the interface through
> USB. (You can see this in the video.)
>
> * It's triggered per track; in the video, for example, the drums
> and keyboard tracks are affected independetly.
>
> I was oriented in #alsa at Freenode that the output of 'alsa-info'
> might be helpful, so here it is:
>
> http://alsa-project.org/db/?f=62f686710cc6c9344a8986707bf3d09248c514d1
>
> (I'm running this on top of a 5.12.5 kernel, which should include
> this fix: https://bugzilla.kernel.org/show_bug.cgi?id=207023)
>
> I'd like to know where should I report this bug (kernel bugzilla?),
> and if there's any other information I can provide to help fixing
> it.
Bugzilla definitely is the way to go.
You may need to recompile your kernel with suggested patch changes
over and over again.
>
> With respect,
> Georges
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Motu M4 - where to report this issue?
@ 2021-05-21 18:49 Georges Basile Stavracas Neto
2021-05-21 20:12 ` Geraldo Nascimento
0 siblings, 1 reply; 3+ messages in thread
From: Georges Basile Stavracas Neto @ 2021-05-21 18:49 UTC (permalink / raw)
To: alsa-devel
Greetings ALSA community,
I recently acquired a Motu M4 interface, and seems to be working
well so far. Everyday usage is completely functional.
However, I noticed an odd sound artifact that happens from time
to time when using DAWs like Ardour and Waveform11. It's a windy,
ghostly sound that happens whenever I open any DAWs (the simple
act of opening them triggers this). Interestingly, audio apps that
use PulseAudio do not suffer from this issue. It's hard to describe
it, so I recorded a video reproducing this problem:
https://youtu.be/bM8x-YuXLVI
A few things I've discovered while trying to understand what's
going on:
* It only happens with apps that use JACK or ALSA APIs. Using
PulseAudio (through PipeWire) does not trigger it.
* Seems like this sound is not an artifact of the interface; it
appears that this odd sound is sent to the interface through
USB. (You can see this in the video.)
* It's triggered per track; in the video, for example, the drums
and keyboard tracks are affected independetly.
I was oriented in #alsa at Freenode that the output of 'alsa-info'
might be helpful, so here it is:
http://alsa-project.org/db/?f=62f686710cc6c9344a8986707bf3d09248c514d1
(I'm running this on top of a 5.12.5 kernel, which should include
this fix: https://bugzilla.kernel.org/show_bug.cgi?id=207023)
I'd like to know where should I report this bug (kernel bugzilla?),
and if there's any other information I can provide to help fixing
it.
With respect,
Georges
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-05-23 8:38 UTC | newest]
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2021-05-21 18:46 Motu M4 - where to report this issue? Georges Basile Stavracas Neto
2021-05-21 18:49 Georges Basile Stavracas Neto
2021-05-21 20:12 ` Geraldo Nascimento
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