Counter Arts and DaFool, thanks for the music advice

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Thanks for pointing out the sound novel term, and you're right, that's what i assumed it meant.
On the foreground/background question, maybe the simplest answer is that, if I wanted something where music was in the foreground, I'd compose a piece by itself, whereas with Mists, the first priority is to tell the story, with the other elements being secondary to that.
In Crescendo on one of the paths, there are two points (I think) where the story stops, and when you click to continue it assumes that you've listened to the whole of the piece being played... I'm not sure if people would want to shift their focus away from the story like that for several minutes each time.
The music video comparison is interesting, but in general terms (there are many many exceptions but I'm guessing this is true for at least 95% of cases) with the western art music tradition, the music is the only element present in the work (discounting the appearance of the performers). Generally the whole work is intended to be listened to silently and applauded only at the end etc... That sort of 'extreme' (or elitist) approach of listening to music is all I've composed for in the past. I guess I'd like to try for the opposite thing, having music solely as a background element. Although defining background, foreground etc is very subjective, that point in Crescendo for me, is the only time I've really felt that music really stepped out of a background role to become an equal element (to the CG at that point).
Probably to cut a long story short, at the moment I think I'd only be able to do something at the extreme ends of foreground/background - depending on how it goes I might try for more of a hybrid with another project.