The lack of documentation on the process for adding an external .brstm reference for smashbros_sound.brsar indicates that the feature is still WIP or I'm misunderstanding something.
GitHub issue:
https://github.com/libertyernie/brawltools/issues/84"I added a new external reference to my .brsar file. There appears to be a few problems with this process.
1. I cannot choose an external file path outside of the folder that my .brsar is in.
2. Adding a valid path to a .brstm does not change the InfoHeaderOffset
3. The last bgm folder in the .brsar is for Z58.brstm. I tried adding Z59 and adding a new sound for my new external reference. The InfoIndex remains at 0.
Since there is a lack of documentation on adding external references, I'm assuming that this process is still a WIP. I'm logging this issue in case I'm missing something that a Brawlbox notification could help clarify."
Please let me know if you can shed any light on this issue. Thanks!