lsof when a lot of apps were running:
kmix       5527 matthias   10u   CHR 116,11      13564 /dev/snd/controlC0
xmms      10576 matthias    8u   CHR 116,11      13564 /dev/snd/controlC0
xmms      10576 matthias    9u   CHR 116,11      13564 /dev/snd/controlC0
amarokapp 10616 matthias   17u   CHR 116,11      13564 /dev/snd/controlC0

lsof when only amarok was running:
amarokapp 10737 matthias  mem    CHR  116,8      13525 /dev/snd/pcmC0D0p
amarokapp 10737 matthias   12u   CHR 116,11      13564 /dev/snd/controlC0
amarokapp 10737 matthias   30r   CHR  116,2      13143 /dev/snd/timer
amarokapp 10737 matthias   31u   CHR  116,8      13525 /dev/snd/pcmC0D0p