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 Convert WAV to MP3 in Audacity
Audacity audio editor updated to v2.3.2, now comes with LAME mp3 encoder
How to export MP3 audio files with Audacity | Accurate Reviews