It's Envy x360 15", Ryzen 5. - when casting via Google-Chrome to Android TV I get sound from both the TV and the Laptop. I can't mute the laptop to get sound from the TV only. Because of the casting delay, having sound from both devices makes for a bad experience. I've tried plugging headphones into the laptop to switch off the external speakers - that doesn't switch them off either!!!! I've downloaded the drivers on HP site for audio, still no joy
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