Hi there,
It doesn't sound like you're heading in the right direction for good sound. On-board motherboard sound is always very noisy (even NForce2 on-board sound,) and you are also listening to MP3's which have ~8% of the data of the original CD audio stream. And a lot of people here think that CD (before throwing away 92% of the data) don't have enough information encoded in them already.
Try ripping CDs that you buy using cdparanoia or (for Windows I think it's called) EAC. Then play these back. Then you are starting to move towards hi-fi.
It doesn't sound like you're heading in the right direction for good sound. On-board motherboard sound is always very noisy (even NForce2 on-board sound,) and you are also listening to MP3's which have ~8% of the data of the original CD audio stream. And a lot of people here think that CD (before throwing away 92% of the data) don't have enough information encoded in them already.
Try ripping CDs that you buy using cdparanoia or (for Windows I think it's called) EAC. Then play these back. Then you are starting to move towards hi-fi.