Can I convert .mp3 files to .aup format.
Converting MP3 Audio Files directly to Audacity Project Files (.mp3 to .aup conversion) is super straightforward, and actually just means importing .mp3 audio to a project in Audacity.
All you need is the obvious access to Audacity, a multi-track audio editor and recorder. By importing an .mp3 audio file to Audacity, and saving the entire project, you will accomplish the desired .mp3 to .aup conversion.
A free, open source software for recording and editing sounds