Problem with replacing bgm assets

[Wrymouth]

I tried to replace a bgm .bin file by creating a custom asset folder in assets, then placing that folder above us in the asset stack in splat.yaml. I took a bgm file from one of my Star Rod mods, placed it in the custom asset folder, and renamed it Mario_s_House_Prologue_3E.bin. I've made a Merlon patch with the changes, which can be downloaded here. After building and running the game, it crashes immediately as seen below. I believe this is a shifting issue.

[bates64]

What's is the difference in file size between your bin and the original? The BGMs being separate bins in splat are a bit of a lie and won't work unless your bin is strictly smaller than the bin it is replacing. BGMs are actually part of an archive called SBN, which we don't support yet; see #1032 for more information

[bates64]

I would recommend making sure that your bin is smaller than the bin it is replacing. If it's smaller, you may also need to pad it out with zeroes to become the same size (but IIRC this isn't required). If it's too large, reduce the number of events in the song with Mamar or replace a bigger file

[Wrymouth]

Smaller size doesn't work by itself, but padding the file with 0s using truncate worked. Thanks!