Ultima Underworld MIDI files
Ultima Underworld 1 MIDI Files
System Shock Theme MIDI files
For other, non-Origin, music stuff, try this page.
Some of the Ultima Underworld 2 MIDI files have invalid play times like 40 odd minutes. They actually average about 1 minute for each of them. I don't have a MIDI file editing program to correct this, but seeing as it's mainly cosmetic, I'm not too fussed.
