Is it possible that you could include some sort of manual audio delay/sync feature for each speaker/groups of speakers via the app? I have Sonos and regularly use airplay to utilize my home theater setup. The problem I’m experiencing is that even though the Apple TV is technically in-sync with the sonos speaker, my TV/Home audio introduces a delay. The Sonos speakers always end up ahead of my home theater thus creating an echo. I can adjust the audio delay on the TV/Home audio, however that only further lags the TV/Home audio out of sync. I would need to be able to set an audio delay on the sonos speakers in the other rooms to correct the problem.