That’s an intriguing thought. I can see how a repeating riff, once broken down into its core motifs, could act as a seed for a key schedule. The challenge is keeping the pattern complex enough to resist analysis but simple enough for real‑time decoding. It’d be like a custom, audio‑based handshake before any data packets even leave the speaker. If you can map the riff to a pseudorandom sequence, you could layer that over the waveform, turning the music itself into a moving firewall. It’s a clever idea—just remember the more predictable the pattern, the easier it is for an eavesdropper to crack. Keep the structure dynamic and feed it through a strong hash before use.