I don't think there's a dedicated tool for thatI am on my Yoshis Island music hack, and I must hear the music files... how can I do that? I need a Player or tool
Or instead go to smashcustommusic.com and download bcstm files from there. They have a better selection. (Just make sure it's lower than 3.3 MB)(go to 3dsthem.es, download any theme, extract the body_LZ.bin, rename the bcstm you want to bgm.bcstm, download and run Usagi, then load the body_LZ.bin. then you should be able to play it)