Copy/Move all the files (you don't need to copy/move the .txt file) in the folder name "a" to your no$gba folder, then run no$gba and load up the game you want to play. After you have successfully run the game, run the a.exe file in you no$gba folder, then press L+Select button. If you don't like the sound result, then press those buttons again until you get the desire result.
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How do I use an emulator?
