:~$ sudo aplay /usr/share/gajim/data/sounds/sent.wav 
[sudo] password for detlef: 
ALSA lib pcm.c:2106:(snd_pcm_open_conf) Cannot open shared library /usr/lib/alsa-lib/libasound_module_pcm_pulse.so
aplay: main:546: Fehler beim Öffnen des Audiogerätes: No such file or directory