Can I convert .nbs audio files to .mp3 format?
Converting Minecraft Note Block Studio Files directly to MP3 Audio Files (.nbs to .mp3 conversion) is not possible; at least not without a workaround.
Use the Minecraft software, which allows users to export NBS files in MIDI format. You can then easily convert MIDI to MP3.
We are not aware of any audio editing software or (online) conversion tool capable of converting NBS to MP3.
A popular game about placing blocks to build anything you can imagine