[gX:~] # kldload snd_driver

[gX:~] # cat /dev/sndstat 
FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <Intel ICH5 (82801EB)> at io 0xfc001000, 0xfc002000 irq 17 bufsz 16384 kld snd_ich (1p/1r/1v channels duplex default)

[gX:~] # cat /boot/loader.conf
...
snd_ich_load="YES"  
...

[gX:~] # cat /usr/ports/addins/bird_1.au > /dev/audio0.0

[gX:~] # pkg_add /usr/ports/packages/All/mpg123.tbz

[gX:~] # rehash
[gX:~] # mpg123 /usr/ports/addins/KnockinonHeavensDoor.mp3

[gX:~] # pkg_add /usr/ports/packages/All/mplayer.tbz

[gX:~] # rehash
[gX:~] # mplayer /usr/ports/addins/egik_v_tumane.avi