Typically, you need to plug in any external speakers (including the Sonos Playbar) to the optical out on your TV itself. This port is intentionally placed at th

Typically, you need to plug in any external speakers (including the Sonos Playbar) to the optical out on your TV itself. This port is intentionally placed at the end of the TV's (latency-inducing) processing chain, and will get you properly synced audio. If you connect to the optical out on any other devices, you're pretty much guaranteed to have sync problems.