Best Audio for next 100 years
Distributed Proofreaders and Project Gutenberg produce projects with a 100 year rule in mind. It may take 100 years before anyone revises a project, so use your best guess when choosing formats. What's going to hold up the longest?
MuseScore has a variety of audio formats available. I've been sticking with .mid because I'm hoping it will improve over time. It's also been around the longest.
What are your thoughts on longevity? Which format would you use, if you could only chose one per project?