How to control sound when casting to Chromecast on Linux?

[darck]

Voice control doesn't work when casting video to Chromecast on linux. It doesn't seem to be any other build in option to control volume of Chromecast.

[Rémi Denis-Courmont]

Control the sound with your TV remote.

[darck]

I don't have one. I am casting to a Monitor with HDMI splitter. I have to control sound with Google Home app on my Android smartphone. I think it's missing feature, but I understand, not the most important if you have limited resources.