Hi,
more news about this problem: I can reproduce this problem without
any disk activity, just using realplayer to listen radio.
My sound board is an audioPCI97:
eap0 at pci0 dev 11 function 0: Ensoniq AudioPCI 97 (rev. 0x08)
eap0: interrupting at irq 7
eap0: CRY19 codec; headphone, 20 bit DAC, 18 bit ADC, Spatializer 3D
audio0 at eap0: full duplex, mmap, independent

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
--