Sonos Beam First Look and setup Optical to HDMI cable - YouTube
Sonos Ray review: This sweet-sounding budget soundbar skimps on HDMI | TechHive
Amazon.com: Toslink Optical Cable Compatible with Sonos Playbar, Bose Cinemate, Solo, Soundstage, SoundTouch, LG LAS Series, Sound Bar, Speakers, TV, Home Theater, PS4, Xbox Digital Audio SPDIF Fibre Optic 3ft : Electronics