TechCrunch
On Friday, Pal Kovacs was listening to the long-awaited new album from rock and metal giants Bring Me The Horizon when he noticed a strange sound at the end of the record’s last track. Being a fan of solving riddles and breaking encrypted codes, Kovacs wondered: does this sound contain a hidden message? Kovacs opened the song in the audio editing app Audacity and, as he suspected, there was indeed a spectrogram — essentially a visual representation of the audio itself — which was actually a scannable QR code.