> I tested two sii3114 SATA RAID controllers (but both are from the same vendor)
> and you were right! MorphOS indeed disables VIA sound with this controllers in
> the PCI slot. Without controller, everything's fine, perfect sound output!

This may work now with MorphOS 3.4:

"Support for SiI3114 cards (master ports only)"
http://www.morphos-team.net/releasenotes/3.4