[MPlayer-users] Can't open audio device /dev/dsp: No such file or directory

[Marcin 'Rambo' Roguski]

> [AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or 

Most linux distros have ALSA/JACK/whatever without OSS enabled by default.
Your mplayer is compiled/configured to use OSS, which you don't have.
Either enable OSS support (install alsa-oss or compile alsa yourself),
or recompile mplayer with ALSA/JACK/whatever you use support.