Ah, you'd need to specify the room name that the PLAY:5 is in. i.e. something like "Alexa, turn up the volume in the living room", where "living room" is the room that the PLAY:5 is in. If you don't name the room, then it assumes you mean the room that the Sonos One is in.
We use 3 different kinds of cookies. You can choose which cookies you want to accept. We need basic cookies to make this site work, therefore these are the minimum you can select. You can always change your cookie preferences in your profile settings. Learn more about our cookies.