You need to try different emulators and sound plugins. I haven't played MKT on an emulator in a long time, but I know ePSXe plays the CDDA if you set it up right, and so did Connectix VGS back in the day, IIRC.
Also, MK Trilogy works 99% perfect on a PS2. The only bugs I ever ran into were if you don't continue when you get Game Over the game will hang, or it will freeze when you beat the game (might depend on the treasure you choose).
I don't know what your GPU is, but your CPU specs are too low to run Dolphin or PCSX2 very well. They are both extremely CPU dependent. nullDC should work just fine though, if you're into Dreamcast.
MK Trilogy works perfect on PS3 too (remember, all PS3s are BC with PS games). There's always the PC version too, which is identical to the PSX version, just needs a patch to run on Windows 7 or 8.