update ;
The pci yamaha i was using never worked properly, so ive had to change my system,
the soundcards i tried:-
pci turtle beach montego a3d - crackly sound, had to use hxdmpi but mame crashed alot.
pci soundblaster live - no sound, only worked with my other motherboard.
pci soundblaster audigy - no sound.
pci soundblaster 16 ct4740 - no sound.
pci yamaha - wouldnt work properly, my card packed up i think.
Got a Soltek 75kav motherboard with 1 ISA slot and no more sound problems.
Im running athlon 1800xp with the board and it runs great, got for £7.00 off ebay.
Im using a ct1350b soundblaster 2.0, it sounds good through a mono cab, but im getting a sb16 soon, feel like a bit of a uber geek messing with all these old bits.