Sorry for bumping an ancient thread, away from the forum and wanted to reply to this.
I wasn't saying that MIDI was perfect, perhaps I went too far in saying almost all good game music could have been done with MIDI, "most" would have been better. And set aside incorrect uses of MIDI such as was/is normal on PC. Sampled audio definitely has more flexibility, although that freedom comes with dangers when combined with mediocre taste! Anyway the MIDI point was more of a footnote to what I was saying: sampled audio has been around for a long time.
But mainly I wanted to thank you for the dreamfall link, I hadn't heard that and it is amongst the best music I've heard in a computer game. Simple, emotive, superb singing.