Ffmpeg convert all files in directory

Converts all *.wav files via ffmpeg (default seettings, stereo, 16bit)

for i in *.wav; do ffmpeg -i "$i" ./wav/${i%.*}.wav"; done

Mix to mono ex. from stereo to mono

for i in *.wav; do ffmpeg -i "$i" -ac 1 "./wav/${i%.*}.wav"; done