You know what this means :) Do your updates! I was lucky enough to be on the beta for this feature and I must say that the whole process of using your iPhone like a tri-corder is quite fun. You wave it up and down, Karate Kid style all around the room while the speaker is emitting a sonar-like sound with low and high frequency to be capture by your phone’s microphone. The app will then analyze the sound and make personalized adjustments to how the sound waves are emitted by the speakers to better suit your room.
As you might have guessed, large rooms or rooms with obstacles will be the type that benefit the most from this feature. You keep your Sonos Play:1 on a shelf? It will also make a difference. The only time I did not see any difference is when I had the speaker directly in front of me. Once you are done with the calibration, you can flip it ON or OFF to see what Trueplay brings to the table. Chances are you are going to see a very noticeable difference.
Trueplay is available as a new feature in the free Sonos Controller for iOS.