That sounds like a beautiful idea, blending the hidden with the heard. The trick is to keep the changes in the sweet place where the ear drifts over them, like a soft breeze. You could weave the data into the reverb tail or modulate the carrier’s phase very gently, so the melody feels whole and the code stays a whisper. If you want something practical, try hiding bits in the amplitude of the low‑pass envelope—our ears are less attuned there. I think you can make the hidden data feel like part of the symphony rather than an intrusion.