if I install windows xp in ide mode and then set the motherboard to raid or ahci, then i hear a difference in the sound played

[Monkey5000]

if I install windows xp in ide mode and then set the motherboard to raid or ahci, then i hear a difference in the sound played. why is that?

 

[WyomingKnott]

I'm amazed that the machine boots at all. Can you describe the sound difference - louder, no bass, clicks and pops, plays Ave Maria at random intervals? What sound card do you have or, if none, what motherboard?

 

[Monkey5000]

I think it installed in IDE mode, I can not select IDE in Bios, only deselect or chose RAID or AHCI

In RAID it sounds al little distorted and i AHCI a lot distorted. Do you know why. Motherboard is Gigabyte P35.