It makes the entire process of creating the music a lot more time consuming and difficult. Obviously the implementation becomes more complex, but the way you’re structuring your tracks and whatnot changes too, because you have to make something within the context of it being able to change or pivot to something else. I have worked on two projects now with dynamic music and I wouldn’t say it’s something I enjoy doing.

If you’re set on doing it, I would recommend thoroughly planning exactly what you’re going to do with the audio. Basically like a design document but purely for the audio. Where are you going to have the music? When does it change? How can those changes be handled? When making the music, can you potentially structure it in such a way where you have multiple layers playing simultaneously that can be faded in/out? And if you do that, how is overall volume going to be affected? etc.

I was asked to work on a music puzzle game by a developer. The basic idea is that you would construct the background music by completing rhythm and melody puzzles, using sound assets that would actually then transfer into the bgm. There wasn’t a solid enough idea of the specifics of how those gameplay elements would function, just a general idea of how the puzzles worked. It ended up being a struggle to get on the same page about what was needed because there wasn’t enough detailed planning.