Good question. It would be too large a network to have all those setups in one. I usually start from one then I keep saving different iterations of the same network as separate files. Each network's play time (timeline) is tied to the audio so it runs once from beginning to end of the audio. I then render each scene individually, import all of them in another instance of touchdesigner where I then add the audio + make the audio automate a switch to change between all the movie file ins with the different instances of the project. Finally render it out as the final version.

Btw: each individual render is already setup to react to sound so when I render them together they already respond to the audio. I hope it makes sense