<![CDATA[Strawberry doesn't find my virtual soundcard via alsa]]>Hi, I have a speaker setting in my room that makes it necessary to swap left-and-right stereo channels in Alsa für Strawberry.

So what I did was to write this into the .asoundrc in my home directory:

pcm.swapped_dac {
    type			route
    hint.description	"Musical Fidelity V90 (L/R vertauscht)"
    slave.pcm		"hw:M2496,0"
    ttable.0.0		0
    ttable.1.1		0
    ttable.0.1		1
    ttable.1.0		1
}

But Strawberry doesn't find my virtual soundcard named swapped_dac. Also not by the Name "Musical Fidelity V90 (L/R vertauscht)".

Any chance I can use Strawberry with that virtual sound card? Both the deadbeef-player as well as audacity are able to play back with hat device...

]]>https://forum.strawberrymusicplayer.org/topic/1474/strawberry-doesn-t-find-my-virtual-soundcard-via-alsaRSS for NodeThu, 05 Mar 2026 08:06:26 GMTFri, 29 Mar 2024 10:47:45 GMT60<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Sun, 07 Apr 2024 10:10:48 GMT]]>Found a solution!

https://debianforum.de/forum/viewtopic.php?p=1358882#p1358665

  1. Install all Pipewire packages

  2. Create this file:
    ~/.config/pipewire/pipewire.conf.d/swapped_channels.conf

  3. and paste this:

context.modules = [
	{ name = libpipewire-module-loopback
		args = {
			audio.position = [ FL FR ]
			capture.props = {
				media.class = Audio/Sink
				node.name = swapped_channels
				node.description = "Switched Channels"
			}
			playback.props = {
				node.name = swapped_channels
				node.description = "my-sink"
				audio.position = [ FR FL ]
				node.target = "Switched Channels"
			}
		}
	}
]
  1. Then Choose pulseaudio in strawberry in and Choose this device: Switched Channels
]]>https://forum.strawberrymusicplayer.org/post/3500https://forum.strawberrymusicplayer.org/post/3500Sun, 07 Apr 2024 10:10:48 GMT<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Thu, 04 Apr 2024 10:01:55 GMT]]>@jonas Hm, but why doesn't strawberry use the custom audio device when I choose "custom" and then paste swapped_dac into the text field? Why does strawberry play back anything at all, if I do that. That seems to be strange. But as I said, when I do the custom thing, the playback channels are not switched.

]]>https://forum.strawberrymusicplayer.org/post/3493https://forum.strawberrymusicplayer.org/post/3493Thu, 04 Apr 2024 10:01:55 GMT<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Thu, 04 Apr 2024 08:44:51 GMT]]>Ok now it seems to be working with pipewire and qpwgraph for changing channels. Needs to activate "auto pin" though and put qpwgraph into the autostart programs. Also needs to set Strawberry to Pulse and then choose the audio card.

But this is buggy because qpwgraph keeps forgetting settings. Hm, not a very good solution.

]]>https://forum.strawberrymusicplayer.org/post/3489https://forum.strawberrymusicplayer.org/post/3489Thu, 04 Apr 2024 08:44:51 GMT<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Wed, 03 Apr 2024 13:23:05 GMT]]>Hm Pipewire doesn't seem to be supported in Strawberry, correct?

]]>https://forum.strawberrymusicplayer.org/post/3488https://forum.strawberrymusicplayer.org/post/3488Wed, 03 Apr 2024 13:23:05 GMT<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Wed, 03 Apr 2024 07:17:24 GMT]]>Hi Jonas, any new ideas about that? In my debian forum someone wrote that pipewire passes music in original quality on to ALSA. I might try that instead of pulseaudio....

]]>https://forum.strawberrymusicplayer.org/post/3487https://forum.strawberrymusicplayer.org/post/3487Wed, 03 Apr 2024 07:17:24 GMT<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Mon, 01 Apr 2024 20:44:10 GMT]]>Hi Jonas, thanks for the reply.

  1. I'm using alsa, becaus I want the best possible quality
  2. aplay -L shows the virtual device:

"swapped_dac
Musical Fidelity V90 (L/R vertauscht)"

aplay -l doesn't seem to show it.
I already tried to put swapped_dac int the "custom" field in Straberry settings unser PCM and HW. It played back, but the channels were not switched.

]]>https://forum.strawberrymusicplayer.org/post/3484https://forum.strawberrymusicplayer.org/post/3484Mon, 01 Apr 2024 20:44:10 GMT<![CDATA[Reply to Strawberry doesn't find my virtual soundcard via alsa on Sun, 31 Mar 2024 21:16:24 GMT]]>@desputin
Is it pulseaudio or alsa you use for output?
Does it show up if you do:
aplay -l
aplay -L

You should be able to manually type the device string in the device text field.

]]>https://forum.strawberrymusicplayer.org/post/3480https://forum.strawberrymusicplayer.org/post/3480Sun, 31 Mar 2024 21:16:24 GMT