[Post-SM] What sound formats do the [Post-Super] Metroid games use?

[Kitsune_Phoenix]

*deleted post*

[zephyrtronium]

GBA games in general use signed 8-bit PCM samples.

But you are starting to do what is known as an XY problem. You have problem X (you want to have sequenced music for your game) and think you can solve it with a solution that creates problem Y (Metroid Prime uses sequenced music, so you want to do it that way, but you don't know enough about that way), so you ask about Y instead of X. Since you asked how post-SM Metroid games implement music, you get my first sentence. If you would make your explanation of your question just be your question, you would get responses indicating trackers and modules.

[Kitsune_Phoenix]

*deleted post*

[P.JBoy]

GBA devs would make AIFF, MIDI and configuration files and run them through a program that converts the MIDI instructions to ASM

[Antidote]

A little late to the party but the Gamecube DSP uses 8, 16 or 24bit ADPCM so you should be able to pop the file into audacity and poke around to find the samples.