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Where are the LXDE sound preferences? - Ask Ubuntu
https://askubuntu.com/questions/80384/where-are-the-lxde-sound-preferences
1) Go to the applications menu > Sound & Video > Mixer. 2) In the Sound Card option menu, select Playback: Built-in Audio Analog Stereo (PulseAudio Mixer). 3) The playback window may be empty. Click on "Select Controls..." , enable/check Master then close. 4) Unmute the sound icon just under the volume bar.
LXDE
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Set the volume in OpenBox/LXDE (or on the command line ...
https://www.artificialworlds.net/blog/2013/03/05/set-the-volume-in-openboxlxde-or-on-the-command-line-with-pulseaudio-and-ubuntu/
Note that if you have more than one enabled audio sink you might need to change the “0” to a “1” or something else. Running pactl stat should help you here. [Beware of bug 686667, meaning you can’t use pacmd and you must have the --at the beginning.] So the correct recipe for your OpenBox config in ~/openbox/lxde-rc.xml is:
How to adjust sound volume from a script? - LXDE Forums
https://forum.lxde.org/viewtopic.php?f=8&t=1491
When I first enter the LXDE session, the volume control applet in the panel shows sound as muted, and volume = 0. I would guess that the commands below would change this: Code: Select all. $ amixer cset iface=MIXER,name='Speaker Playback Switch' on $ amixer cset iface=MIXER,name='Speaker Playback Volume' 50. But apparently nothing happens.
Qt5 port of Pulse Audio Volume Control (pavucontrol) - LXDE
https://blog.lxde.org/2016/09/01/qt5-port-or-pulse-audio-volume-control-pavucontrol/
There has long been needs for a simple Qt frontend for pulseaudio-based audio mixer. So I ported the gtk+ version pavucontrol program to Qt5 for use in LXQt. Here is a screenshot. The source code is here. https://github.com/lxde/pavucontrol-qt Since the original source code of pavucontrol is written in C++, it becomes trivial to port it to Qt.
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