Bulk convert mp3s to wavs using ffmpeg (foss)

Put all the mp3s in a folder and open Terminal in that folder and do:

for f in *.mp3; do ffmpeg -i "$f" "$(basename $f).wav"; done

However, this will produce filenames like originalName.mp3.wav. This will cause errors on SD cards, and you might have to reformat the SDcard (it will lock all the files and folders as 'read only'.)