[Game Maker 8 Pro]Comprehensive Gameboy Zelda Engine

[Phaze]

Game Maker doesn't naturally support fading in and out non-MIDI files; you'd have to use extension packages for that.

Wow that's... kinda surprising. You'd expect functionality like that to be standard
I'd recommend it if you have the option, though. It'd aid to a degree in immersion. I always find jarring sound changes like that to instantly 'eject' me, if you know what I mean.