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Xbox Support
https://support.xbox.com/en-US/help/hardware-network/display-sound/choosing-speaker-audio-output#:~:text=To%20adjust%20your%20settings%2C%20press%20the%20Xbox%20button,Speaker%20audio%2C%20you%20can%20adjust%20the%20following%20settings%3A
Best audio setting for 360? - Microsoft Community
https://answers.microsoft.com/en-us/xbox/forum/all/best-audio-setting-for-360/5f538577-384c-4357-970b-4e1ee41125c1
The digital output setting only selects whether you will get 5.1 Dolby Digital sound or 2.0 sound over the digital outputs (optical output and HDMI). If your headset has an amplifier which supports Dolby Digital and your Xbox 360 is connected to it from its optical output, I recommend setting the Xbox 360 to Dolby Digital.
Xbox Support
https://support.xbox.com/en-US/help/hardware-network/display-sound/choosing-speaker-audio-output
Select Profile & system > Settings > General > Volume & audio output. Under Speaker audio, you can adjust the following settings: HDMI audio - Keep this set at Stereo uncompressed unless your HDMI cable is plugged into a receiver that can process 5.1 or 7.1 uncompressed signals or bitstream formats. If your receiver works with these formats ...
Xbox 360 HDMI - Connecting Headsets for Game Audio ...
https://support.turtlebeach.com/hc/en-us/articles/223083827-Xbox-360-HDMI-Connecting-Headsets-for-Game-Audio
Stereo Headsets. If your Xbox 360 and TV are connected via HDMI, the headset's RCA splitter cable (included) will need to be connected to 'AUDIO OUT' jacks on the back of your TV (pictured below): The RCA Splitter cable MUST be connected to 'AUDIO OUT' jacks, specifically. If they are labeled 'Audio In', 'A/V In', or Component, they will not send audio out for the …
XBOX 360 no sound only video on HDMI - Microsoft Community
https://answers.microsoft.com/en-us/xbox/forum/all/xbox-360-no-sound-only-video-on-hdmi/1f3b0327-d807-4d88-bb11-c39a554b6963
My XBOX 360 was working properly but since I took a new TV LG LED it has stopped working properly. It displays only video and there is no audio. I am using HDMI cord to connect the console to TV. Any suggestion/solution.
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