app shows stereo pcm / 2.0, but using eARC and surrounds | Sonos Community
Sonos Playbar 5.1 Home Theater System with Voice Control (Black Playbar & Sub/White speakers) Includes Sonos Playbar, Sub, and 2 Sonos One (Gen 2) speakers with Amazon Alexa, Google Assistant, and Apple
Sonos Playbar: How to Make it Sound Better | Vaetr Design