@@ -33,6 +33,20 @@ brew install blackhole-2ch sox
3333export OPENAI_API_KEY=sk-...
3434```
353536+`blackhole-2ch` installs the `BlackHole 2ch` virtual audio device. Homebrew's
37+installer requires a reboot before macOS exposes the device:
38+39+```bash
40+sudo reboot
41+```
42+43+After reboot, verify both pieces:
44+45+```bash
46+system_profiler SPAudioDataType | grep -i BlackHole
47+command -v rec play
48+```
49+3650Enable the plugin:
37513852```json5
@@ -74,6 +88,21 @@ the microphone/speaker path used by OpenClaw. For clean duplex audio, use
7488separate virtual devices or a Loopback-style graph; a single BlackHole device is
7589enough for a first smoke test but can echo.
769091+## Install notes
92+93+The Chrome realtime default uses two external tools:
94+95+- `sox`: command-line audio utility. The plugin uses its `rec` and `play`
96+ commands for the default 8 kHz G.711 mu-law audio bridge.
97+- `blackhole-2ch`: macOS virtual audio driver. It creates the `BlackHole 2ch`
98+ audio device that Chrome/Meet can route through.
99+100+OpenClaw does not bundle or redistribute either package. The docs ask users to
101+install them as host dependencies through Homebrew. SoX is licensed as
102+`LGPL-2.0-only AND GPL-2.0-only`; BlackHole is GPL-3.0. If you build an
103+installer or appliance that bundles BlackHole with OpenClaw, review BlackHole's
104+upstream licensing terms or get a separate license from Existential Audio.
105+77106## Transports
7810779108### Chrome
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