Glitchy Music, HELP!

[TheRealDylanator]

Ok, I made a Bstrm ( Btsrm, Brstm?) for halloween and when I tested it in my music then in battle, it sounded all glitchy but in brawl song manager it sounded fine, any reason why a song may come out glitchy?

 

[Moydow]

Delete the BRSTM file(s) from the SD card, and re-add them.
If this doesn't fix it, defragment the card.