[dmlittle]

"Ultrasonic watermark" reminds me of this[1] great blogpost. It's not the same thing but based on the same concept.

[1] https://blog.benjojo.co.uk/post/encoding-data-into-dubstep-d...

[_underfl0w_]

This was on the front page of HN earlier this week, wasn't it? It's beginning to feel like an echo chamber in here sometimes...