Audacity projects (*.aup files) might be exported as common MP3 using the Audacity program itself. Otherwise there is no way how a project could be converted to audio, because it usually contains just references, not the actual multimedia file.
Convert Audacity project to Compressed audio and music file, mp3 songs or ringtones.
We found 3 software records in the database related to .aup to .mp3 file format conversion.
Microsoft Windows software - convert aup to mp3 on Windows
A free, open source software for recording and editing sounds
Convert from aup file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned aup to mp3. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert aup to mp3 on OS X
A multi-track audio editing tool
Linux/Unix software - convert aup to mp3 on Linux
Multi-track audio editor for Linux