SET PATH=%PATH%;D:\Program Files\ffmpeg-2021-01-24-git-1775688292-full_build\bin;

@echo off
mkdir WAV

    for %%f in (*.*) do (
    echo "%%f"
    echo "WAV\%%~nf.mp3"
    ffmpeg -i "%%f" -acodec pcm_s16le -ar 44100 "WAV\%%~nf.wav" 
)