Users searching for sb3 to wav conversion are typically looking for a way to create music from Scratch 3.0 projects and save it in separate, standard audio WAV format. As far as we know, this can be done simply with Scratch itself of appropriate version.
If you do not have access to Scratch, some users advise to use Audacity or similar audio software to read the RAW audio data from .sb3 files manually. But whether this actually works is another matter.
Updated: October 30, 2023