Try playing sound with artsplay / path/ to/ some/ soundfile. Try various formats, ogg, mp3 and wav. Any error messages there might be useful in pointing you in the right direction.
Probe a reproducir son mediante artsplay / rota/ a/ ficheiro/ de/ son. Probe con varios formatos, ogg, mp3 e wav. Calquera mensaxe de erro pode serlle útil para indicarlle a solución correcta.