I want to configure mplayer conf so that the player's default volume is not 25%. I have to increase the volume via the keyboard with every song/flick. I can only find solutions that simply over-pushing the soundcard...
You can run mplayer with the -af flag:
mplayer -af volume=10:1
where the value 10 means the sound is amplified by 10dB
To set this, edit the mplayer configuration file:
add the option:
The af flag alters the hardware volume. If this doesn't work, you can try specifying the software mixer, and altering the software volume with the options: