Linux之pulseaudio左右声道互换，发现方法之原帖：https://unix.stackexchange.com/questions/718668/switch-invert-left-and-right-audio-channels-on-linux-system-wide。此法需要重启系统后再运行一边CMD指令，还需慢慢琢磨出以系统设置之法，免去开机重新设置之累也。
pacmd load-module module-remap-sink master=alsa_output.usb-bestechnic_EDIFIER_N300_20160406.1-00.iec958-stereo sink_name=Inversed-PA sink_properties=device.description=Inversed-PA channels=2 channel_map=front-left,front-right master_channel_map=front-right,front-left
First, get sink (device) name:
$ pactl get-default-sink
…
Name: device-xxx
Reverse channels:
$ pacmd load-module module-remap-sink master=device-xxx sink_name=Inversed-PA sink_properties=device.description=Inversed-PA channels=2 channel_map=front-left,front-right master_channel_map=front-right,front-left
where
master= the device according pactl output.
sink_name= is for pulseaudio.
sink_properties=device.description= is for pavucontrol.
Last, select:
$ pactl set-default-sink Inversed-PA
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