Clear space off your card, a lot of it, or buy a bigger card. If you're using a 2 GB, throw out what you don't need. Having more free space usually fixes the problem.

@Haku-men Thanks a bunch :] It definitely got rid of the static and switching songs.

@Vyse Thank you so much, I watched and read your tutorial. I just thought maybe the high quality could've been the problem, but you said something about that not being the problem. I apologize, I was up late doing this. .-.

@segtendo I just had to reformat it, but if it gets full again, I'll try that.
 
EDIT: I am using a 2gb, I'm aware of the fact that it sadly can't handle any higher than that ;-;

I am using the BCSM GUI v1.5.0.0
All my songs are full, loop is checked. It loops perfectly when I test play the .brstm on the program. The format for the file is WAV PCM signed 16 bit Stereo 32000Hz and 1024 kbps.
Is that too high? ;__; It's really heavy Nintendocore .-.
However, I use the SD card loader, and when it loads the music, it cuts out and starts playing a staticky version of another song instead? :I
I don't really think I should try the backing up and reformatting because I have 60mb free on the SD.
Any help is deeply appreciated :3