So, we see this in halo 5 where we can place audio objects that loop specific sounds, songs, etc. but it was very cluttered due to each individual sound. Especially the music volumes. Plus the song choices were limited.
So I think there should be a specific sound fx that is called “music: universal” where it has every song in the score. But! If you wanted to you can single out certain songs to play a specific sub set of songs on playback only. Like Spotify with their playlists for example, you can include or exclude whatever song you may want. You’d also have the choice of changing the radius, volume of loudness, etc.
so say you want a aesthetically pleasing scene, you’re in a forerunner structure exploring it’s massive corridors or tight hallways. You’d want the music to only play very soothing but ominous forerunner like music like we see in the campaign! And you’re able to change the volume wideness so you wouldn’t hear the song unless you enter the structure/part of structure where it is set/queued.
Or say you create an epic bossfight using scripting. Once the boss is introduced it goes from ominous to combative music. Like say from the song “command spire” to the song “echerum” using a scripted queue. Of “when player enters volume, (specific) command happens” and the music changes and the boss is introduced
I think it would make things easier.