A:Answer Hello PCMavailability! The Roku Select Series TVs, including the 65" model, do not label audio output as "PCM" in the menu. Instead, Roku uses these optical options: Digital Audio (optical) - when using an optical cable to soundbar, set the TV's audio settings to audio output optical/ digital audio. Roku automatically outputs either PCM (stereo) or Dolby Digital (5.1) depending on what the connected device can support.
