I didn't mean ambient neccessarily. It could be any disk, as long as there's enough contributions of this any genre to fill a disk. Multigenre disk? I'm not so sure about that, maybe a wide genre then... Or a disk with a theme indeed. Even a name could set alot (thinking about Jesper Kyd's work). He has so many different stuff, music for games and such, and there's no specific genre. But it all fits together!