I am looking for a CLI tool that will give me an output of the frequency range of an MP3 file, like Spek does, but without the image file. I need to this to analyse a large library of MP3 files to determine which files are not "true" 320Kbps.
ffprobe is what you need. It comes with the package
ffmpeg (in debian and derivative), also you can download and compile with extra features from here.
Just pass the file as an argument like
and you will get the information of the file.
For more information you can check the man page of
ffprobe and if your are interested, the man of the
ffmpeg too. Both are very powerfull progrmas and can do a lot
Check this link for examples of