Audacity tutorial: Converting to mp3 or AAC and other formats, example: Matthew Smith - epic orchestral synth music for film and game effects; Buanzo's LAME mp3 library
How To Add MP3 Support to Audacity (to Save in MP3 Format)
Audacity 3.2.1 Free Download
mp3 - In what format is Audacity processing compressed audio files? - Super User
Как добавить поддержку MP3-формата в Audacity
MP3 decoding failed: lost synchronization : r/audacity
Configuring Audacity and LAME MP3 - Jake Ludington's Digital Lifestyle