Here's a story about some real life steganography using guitar riffs to hide morse code in a pop song to message hostages: https://www.theverge.com/2015/1/7/74

Here's a story about some real life steganography using guitar riffs to hide morse code in a pop song to message hostages: https://www.theverge.com/2015/1/7/7483235/the-code-colombian-army-morsecode-hostages https://www.theverge.com/2015/1/7/7483235/the-code-colombian... (It has been on HN before but not recently I think.)