I have a new desktop PC to which I've added Extix in a separate partition from Windows. Extix is a one-man distro based on Debian/Ubuntu with LXQT for its desktop environment. It includes SMPlayer for its audio/video playback.
Windows 7 on this PC plays audio through the external speaker system I have plugged into the PC. However, SMPlayer in Extix is playing MP3s through the little speaker inside the PC. It's not playing MP4s at all.
I don't know how to start selecting audio and video drivers listed in SMPlayer. Synaptic has a bunch of mplayer, pulseaudio, and alsa stuff installed.
Lane