8 hours ago
Technically, MobileSheets will accept .mp3, .mp4, .m4a, .aac, .flac, .ogg, .mkv, .3gp, .ts, .mid, .xmf, .msmf, .rtttl, .rtx, .ota, .imy, .wav and .wma, but that is only Android (the support differs a little per OS depending on what the Audio framework on that OS supports). I generally would recommend sticking with the most common file formats, and you will have the least number of issues if you use mp3.
Mike
Mike