#! /bin/sh -e

# Reverse:
# dd if=whatever bs=16 skip=1 | zcat

key='vegetable multitude'

echo $key > key

dd if=src.mp3 bs=4 count=1 > out.mp3
dd if=/dev/zero bs=4 count=3 >> out.mp3
(cat noise.txt; echo; echo "The key is \"$key\".") | zip - - >> out.mp3
cat src.mp3 >> out.mp3

md5=$(md5sum out.mp3 | awk '{print $1;}')
mv out.mp3 $md5