Welcome to the Citric Composer collection by Gota7 and Aqua-San! Here you can find some useful tools for editing Wii U and 3ds sound.
Downloads Citric Composer Installer - An installer for the current version of Citric Composer, a WIP editor for B_SARs.
Retsuko Sound Tool (Extractor/Injector) - For extracting and re-injecting files in a bfsar, bcsar, whatever. Just make sure the new files you want to add are less than or equal to the original files� file size.
Koopa Harmony (Bahp) - For editing koopa dance moves in NSMB2, and maybe other games that use bbid.