The current release of Audio Overload supports music in the following file formats:

AHX - Commodore Amiga
AY - Amstrad CPC/Spectrum ZX/Atari ST
COP - Sam Coupe
DSF - Sega Dreamcast
GBS - Nintendo Gameboy
GSF - Nintendo Gameboy Advance
GYM - Sega Megadrive/Genesis
HES - PC Engine
HVL - Commodore Amiga
IMF - PC-compatibles, various Apogee games
KSS - MSX
MDX - Sharp X68000
MOD - Commodore Amiga
NSF - Nintendo NES
NSFE - Nintendo NES (enhanced tags)
ORC - TRS-80 Orchestra-90
PSF - Sony PlayStation
PSF2 - Sony PlayStation II
QSF - Capcom QSound
RAW - PC-compatibles with an AdLib
ROL - PC-compatibles, AdLib Visual Composer
S3M - PC-compatibles with a GUS or SoundBlaster
S98 - NEC PC-98
SAP - Atari XL/XE
SCI - PC-compatibles, various Sierra games
SNDH - Atari ST
SPC - Super Nintendo
SPU - Sony Playstation
SSF - Sega Saturn
VGM - Sega Master System/Game Gear (and lots more)
VTX - Spectrum Vortex Tracker
WSR - Bandai WonderSwan/Wonderswan Color
YM - Amstrad CPC/Spectrum ZX/Atari ST