@hnashif OK well PCM 2.0 audio format is a digital version of Two-channel / L+R / Stereo. On the Roku Express+ 3710 (2016) and 3910 (2017) (which are the only current Roku devices with non-HDMI outputs) and pre-spring 2013 Roku device models (which are no longer supported as of summer 2020), Stereo is the only audio output format heard on the non-HDMI outputs (composite and Y/Pb/Pr). Due to analog TV sets becoming obsolete and going bye-bye in around late 2000s/early 2010s, none of the major streaming players are being produced with analog video output ports anymore, so most of the programming today, and most HDMI workaround adapters will expect the end user to use a 16:9 set. There may be generic unlicensed/no-name brand Android devices with the analog ports, circulating around Chinese and Mexican-based online stores and eBay but I’d recommend a major streaming player over a generic unlicensed player any day. I mostly shop on eBay for analog audiovisual electronics and videotape releases including public domain releases and Disney releases.
I’m into videotapes and old electronics stuff, including extenders, converters and analog 4:3 TV sets (which are obsolete these days), and Miss Bianca is my favorite character in Disney’s The Rescuers (1977) and its sequel, The Rescuers Down Under (1990). I am not a Roku employee, only a user like you. ~ Jordan
Roku Express+ 3910X