How can I convert .m2a audio files to .mp3 format?
Converting MPEG-1 Layer 2 Audio Files directly to MP3 Audio Files (.m2a to .mp3 conversion) is certainly possible and should be quite straightforward.
Use an audio editing program or (online) conversion tool, such as Adobe Media Encoder, which allows users to import M2A audio files and export them in MP3 format.
Multimedia encoding application from Adobe
A timeline-based video editing software from Adobe