<h3>these files are either exactly the same as, or somehow worse than, the stuff in the parent folder</h3> neat oneliner to compare the audio contents of files (so the checksum is not affected by tags or embedded cover art): <pre> while IFS= read -r x; do ffmpeg -hide_banner -nostdin -i "$x" -f framemd5 - | awk '/media_type [0-9]: audio/{sub(/:.*/,"");sub(/.* /,"");tgt=$1 ","} $1==tgt{sub(/[^,]+/,"");print}' | shasum; echo; done </pre>

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