I recorded them without SFX by editing the brsar file on the game disc and Riivolution to use the modified brsar. However this one is done without hex editing files. It's recorded by having my town tune being silence. Every hour you hear your town tune without bgm playing, but because bunny day is not effected and your town tune is silence you can record it without sfx."
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Still, that doesn't exactly explain how to go about unpacking the sound files.