Deep Lyrics

For audio steganography challenges, the only truly viable audio is Rick Astley's "Never Gonna Give You Up" - truly a timeless classic. The title of the challenge "Deep Lyrics" was a hint towards the tool used to solve it. Naturally, I got searching and found "DeepSound" - a tool capable of hiding files inside of audio. After installing it, I opened the file using it and found "not-sorry.txt" which contained the flag.

rtcp{got_youuuuuu}