So it seems like the BGMs do have a limit on volume before the game decides to give me arm11 crashes. I know this because its what i've been messing around with lately. Also been trying to build a cia with the BGMs locked in. Though again messing with it too much it ends up with more arm11...
PSA
Due to GBATemp's rules I have removed links to the actual BGMs. I will place them on "that iso" site. Sorry if this is an inconvenience to you or friends. I am always happy to help via PM as well if you have issues with anything. Thank you,
If you are referring to the Cherry pack that means you can put the Cherry blossom festival version of the hourly music over the default hourly music and or over the rainy day hourly music.
https://gbatemp.net/threads/release-animal-crossing-new-leaf-gcn-music-pack.468982/
If you are looking for GCN music swap I have a thread up. Known to work with Luma and B9s so far. All the work is done,