How to Enable LAME MP3 and FFmpeg in Audacity to Export Different File Types - YouTube
free mp3 converter - Lame for Audacity - FFMpeg for Audacity - Free and Safe downloads
How to Convert M4A to MP3 in Audacity
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)
Installing FFmpeg Library in Audacity - Appuals.com