A high quality MP3 encoder
wxLame is a free front-end for the LAME MP3 encoder.
What's inside your mp3 files REALLY ?
Command-line mass conversion of any directory tree of audio files.
FFmpeg with HEVC (8/10 bit) and HE-AAC
Easy to use shell script for batch conversion MP3 files to AAC+
A tool for automated downmixing of live multitrack sound recordings
KDE4 GUI bash script to save youtube videos as mp3 files