As a teenager, learning how they did this on a technical level blew my mind a second time!

Such a shame more games don’t use this. It worked for PSO because fights were relatively drawn out/telegraphed, so there was always a chance to build up/slow down the music.

I wonder if AI could get used to dynamically generate a transition between battle/overworld themes. Or at least, if the composer makes one and use AI to make all necessary versions.