SFX ripping/decoding/dumping features?

[Aleron Ives]

Do all GC games use ADX or some similar kind of ADPCM for their sound effects, or are there some games that use sequenced sound effects, too? Does GC have its own form of PSF? I know that the GameBoy Advance has GSF and the Dreamcast has DSF (as well as the PS2 having PSF2), but I've never come across any mention of a GC PSF variant.