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Finding PCM output on Xbox 360 settings | Headphone ...
https://www.head-fi.org/threads/finding-pcm-output-on-xbox-360-settings.775280/
PCM is really like default audio (uncompressed audio), so I'm assuming most of the Xbox's audio settings are to change audio from default. Make sure nothing it set for 6-channel (5.1), you want 2.0 audio. So, it seems like the Xbox is set to output digital audio thru the HDMI output and you want to output digital audio to the optical output.
PCM audio over HDMI - Microsoft Community
https://answers.microsoft.com/en-us/xbox/forum/all/pcm-audio-over-hdmi/2cb9576e-e561-47cd-9b22-78cace312a68
I'm going HDMI from the Xbox to the audio stripper box which then passes the PCM audio to the sound amps and outputs the video through HDMI which I have going into the projector using a HDMI to DVI cable. The Xbox is displaying it's outputting DVI in the settings not HDMI. Is there a way to 'trick' the Xbox at all? I'm guessing there isn't.
Xbox One and Xbox 360 audio compared - GameSpot
https://www.gamespot.com/articles/xbox-one-and-xbox-360-audio-compared/1100-6413838/
Speech is captured on the Xbox One at 24 KHz PCM, which is triple the rendering sample rate and a 50 percent capture rate improvement over Xbox 360 headsets, Microsoft said.
Why do I always get 2 channel pcm from xbox 360 | AVS Forum
https://www.avsforum.com/threads/why-do-i-always-get-2-channel-pcm-from-xbox-360.2537233/
Start the Xbox 360 console without a disc in the disc tray. Go to Settings and select System. Select Console Settings, and then select Audio. Select Digital Output, and then select the digital output used by your audio system: Digital Stereo; Dolby Digital 5.1
Xbox 360 and Digital Optical Audio - Microsoft Community
https://answers.microsoft.com/en-us/xbox/forum/all/xbox-360-and-digital-optical-audio/f844f8c7-6160-4557-96b9-da046c4c85ea
Set the TV to output PCM ; Connect the TV to the sound bar via Toslink ; I believe this should avoid the whole system sound overlay problem by leaving the conversion up to the TV. Your TV should convert the audio of any non DTV source to stereo PCM which your sound bar should accept, at least if I'm reading the manual right.
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