UPDATE: Version 5a98191 added.
Tested with this games =D (Bold are my sound test)
Super Mario Advance (E): Perfect, the speed of the sounds and music is also perfect, but is glitchy
Sonic Advance (E): Same than Super Mario Advance, but a very little slow
Mother 3 (J+Spa): Slow and multiple errors screen after entering the names, minor glitches with the music issues
Sega Arcade Colection (E): The games are sometimes slow and the 3D floor in the 4 games are glitched and Space Harrier crashes in the 2nd stage, but the sound is totally perfect, no errors!!!
Super Mario Advance 3: Yoshi´s Island (E): Multiple errors screen after Nintendo logo, sound of the language selection and Yoshi's voice had no glitches
Pokémon Rojo Fuego (S): Multiple errors screen
Pokémon Ruby (S): Multiple errors screen
Kirby Nightmare in Dreamland (E): Multiple errors screen
Mario vs Donkey Kong (E): White screen
....
There are a large list with the multiple errors message (error rec 0E593100 000000002), like Sonic Advance 2, Pokémon Pinball Ruby and Saphire and many more
Great job with the sound, the only game proved that the sound is perfect is Sega Arcade Colection at the moment
EDIT: Ok, press X when the load times xD