#neg23 Python script to automate loudness normalization (to -23 LUFS) using FFmpeg and sox. Run the program with a single argument, either an audiofile or a directory, and the files will be handed to FFmpeg for EBU R128 analysis and then to sox for gain adjustment. Processing, even large files, is very fast. Processed files are saved within the input directory (in a subfolder called neg23.) Correct usage:

$ neg23 somefile.wav
$ neg23 neg23 /directory/for/batch/processing/

If you want to be able to run neg23.py from the terminal by just typing 'neg23', first make the script executable and then copy it to /usr/bin. Like this:

$ chmod +x neg23.py
$ cp neg23.py /usr/bin/neg23

You should have both FFmpeg and sox installed on your machine.

$ brew install ffmpeg
$ brew install sox