User:Jens3/Setting the default audio device
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After a reboot I was unable to play sound, neither with Firefox nor with mplayer. By random I realized that [c]vlc was working. leio recommended the player media-video/mpv.
user $
mpv --audio-device=help
Playing videos with the following worked:
user $
mpv --audio-device=alsa/sysdefault:CARD=b1 <filename>
The default sound config has changed somehow and differs between my user and root:
user $
amixer info
Card default 'pulse'/'PulseAudio' Mixer name : 'PulseAudio' Components : '' Controls : 4 Simple ctrls : 2
root #
amixer info
Card default 'b1'/'bcm2835 HDMI 1' Mixer name : 'Broadcom Mixer' Components : '' Controls : 2 Simple ctrls : 1
ALSA in the gentoo wiki.