Reverse engineering Apple's proprietary 5 GHz lossless low-latency audio protocol (internally ULLA) in the H2 chip of AirPods Pro 2 (USB-C) and Apple Vision Pro. Setup protocol documented field by field; a session can be started from an ordinary Linux host.
linux apple reverse-engineering bluetooth airpods l2cap pipewire lossless-audio vision-pro airpods-pro wireless-audio ulla h2-chip
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Updated
Oct 23, 2026 - Python