Reverse audio channels

[Rava]

Is there a way to reverse the audio channels with the standard Port 5.0 XFCE setup?

Due to how my active speakers are wired, the left-channel speaker sits on the right and the right channel speaker an the left. (They could not be placed any other way due to how the cable layout is.)
At least in its normal settings via the task bar icon / PulseAudio Volume Control I see no option in accomplishing that but I hope it is possible when editing a setup file?

[Testuser]

Hi Rava,

I have once tried Alsa Volume control panel.

It had couple of options, but not sure reverse audio channel is available in it or not.

Need to check the same in other distro.

[Rava]

The F3 aka "Show playback controls" is quite minimal in alsamixer:

Code: Select all

┌───────────────────────────── AlsaMixer v1.2.5.1 ─────────────────────────────┐
│ Card: PulseAudio                                     F1:  Help               │
│ Chip: PulseAudio                                     F2:  System information │
│ View: F3:[Playback] F4: Capture  F5: All             F6:  Select sound card  │
│ Item: Master                                         Esc: Exit               │
│                                                                              │
│                                     ┌──┐                                     │
│                                     │  │                                     │
│                                     │  │                                     │
│                                     │  │                                     │
│                                     │  │                                     │
│                                     │  │                                     │
│                                     │▒ │                                     │
│                                     │▒▒│                                     │
│                                     │▒▒│                                     │
│                                     │▒▒│                                     │
│                                     │▒▒│                                     │
│                                     │▒▒│                                     │
│                                     ├──┤                                     │
│                                     │OO│                                     │
│                                     └──┘                                     │
│                                    54<>43                                    │
│                                  < Master >                                  │
└──────────────────────────────────────────────────────────────────────────────┘

Added in 1 minute 44 seconds:
At least it does show that my main volume is set differently for the right and left channel, but I see no option anywhere for reversing channels.

Added in 5 minutes 5 seconds:
I presume it is either
● not possible or
● one of those moments where you need to manually hack a certain settings file and either tweak a setting or insert a new setting with the specifics you want/need.

And if it's the 2nd then you cannot know what to do by yourself, you have to find it somewhere online or maybe halfway hidden in some readmes or howtos.

[Testuser]

Hi Rava,

Can you move to bottom and select "Master", then press right or left key in keyboard, it shows the channel (not sure though).

This is what I remeber when I used Alsa mixer. Not sure.

Please go through this link as well, which I found mentioning some steps

https://superuser.com/questions/59481/h ... -in-ubuntu

[ncmprhnsbl]

try: /etc/pulse/daemon.conf :
change line:

Code: Select all

; default-channel-map = front-left,front-right

to

Code: Select all

default-channel-map = front-right,front-left

maybe.. uncomment (;) the 'default-sample-channels = 2' line too

[donald]

This work for me with my card (onboard sound)

Create ~/.config/pulse/default.pa with following content:

Code: Select all

.include /etc/pulse/default.pa
load-module module-remap-sink sink_name=reverse-stereo master=0 channels=2 master_channel_map=right,left channel_map=left,right
set-default-sink reverse-stereo

delete all the other files in ~/.config/pulse/
open the task-manager > kill pulseaudio, it will/should respawn and use the new settings.

open the audio mixer and select what you need.

If it does not work for you, it might bring you on the right track.

[Rava]

^
Thanks donald, done exactly that, now i also have everywhere the "Remapped Build-in Audio Analog Stereo" and when doing the left/right sliders after I unjoined the sound (e.g. in a ffplay stream) it seems to correspond to the correct channel.

Added in 2 hours 10 minutes 17 seconds:

Code: Select all

yt-dlp -f 251 M05w0gIDQVM

and then

Code: Select all

ffplay  -autoexit -hide_banner -showmode waves -x 500 -y 150 -i  Left-Right\ Channel\ Audio\ Test\ \[M05w0gIDQVM\].webm

is a better idea than my previously mentioned (and now erased) Led Zeppelin one. "Only the left channel…"

And yes, donald's solution with the ~/.config/pulse/default.pa works as it should, thanks to donald and "M05w0gIDQVM"