Another idea: if you've already done the hard work of fanning out a synchronized audio stream to multiple speakers, you don't need any distributed logic to mani

Another idea: if you've already done the hard work of fanning out a synchronized audio stream to multiple speakers, you don't need any distributed logic to manipulate the audio stream itself. So just encode the volume change directly into the stream before fanning it out. I hope the Sonos lawyers don't come after me for this.