Can I use the Harmony Hub to connect my Sonos devices (Play 1 and Play 3) directly to the Google Chromecast 2? My problem is that I have a projector which has no audio output. I stream movies and series via Google Chromecast 2 through the HDMI input, but I am not satisfied with the sound of the projector at all. Is there a way to connect the Chromecast 2 to the Sonos speakers with the Harmony Hub?

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Rather not, Harmony only controls the two devices, but does not transmit the audio signal from one to the other.
 
What would work, however, is to branch off the audio signal from the HDMI and connect it via Toslink cable to a Sonos Connect, which streams the audio signal to the Play 1 and 3. Example:
 
- Audio Extractor between Chromecast and TV: [Delock HDMI Audio 5.1 Extractor, 4K, 60Hz](https://www.digitec.ch/de/s1/product/delock-hdmi-audio-51-extractor-4k-60hz-switch-box-8346268) (Power via a USB port or mobile phone power supply)
- Sonos Connect: [SONOS CONNECT](https://www.digitec.ch/de/s1/product/sonos-connect-multiroom-system-230830)
- Toslink Cable: [Value Toslink Cable (1m, Entry, Black)](https://www.digitec.ch/de/s1/product/value-toslink-kabel-1m-entry-schwarz-audio-kabel-2481941)

Unfortunately a bit expensive, but it works like this.

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