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Wii U - Surround Sound Guide and FAQ | NeoGAF
https://www.neogaf.com/threads/wii-u-surround-sound-guide-and-faq.500865/#:~:text=The%20Wii%20U%20does%20not%20have%20an%20optical,one%20AV%20port%20on%20the%20back%20is%20active.
Wii U - No optical audio connector? Nintendo. Fix this ...
https://www.neogaf.com/threads/wii-u-no-optical-audio-connector-nintendo-fix-this.448688/
Wii U Audio Settings Wii U Mode HDMI - 1.0 channel (Mono), 2.0 channel (Stereo), or 5.1* channel (Surround) LPCM *Compressed digital formats (Dolby Digital, DTS, etc.) are not supported. Analog - 1.0 channel (Mono) or 2.0* channel (Stereo) *No option for a surround mix (ProLogic II, etc.). AUDIO AND VIDEO MUST COME FROM THE SAME SOURCE.
Wii u optical sound | AVForums
https://www.avforums.com/threads/wii-u-optical-sound.1696043/
My guess is that since the Wii u will not support optical out of the box then the option to bitstream the audio will also not be there as in theory there is no.need for Nintendo to include this option as they will be using HDMI to send both video and audio as standard.
Wii U - No optical audio connector? Nintendo. Fix this ...
https://www.neogaf.com/threads/wii-u-no-optical-audio-connector-nintendo-fix-this.448688/page-15
In order for the system to output multichannel audio through a toslink cable it would have to support some sort of compression format other than outputting PCM. The Wii U doesn't do that. M Matt Member Jun 7, 2004 10,824 3 1,320 Sep 30, 2012 #703
Is it possible to get Digital Output audio with Wii U? : wiiu
https://www.reddit.com/r/wiiu/comments/2vavni/is_it_possible_to_get_digital_output_audio_with/
The Wii U doesn't have any optical outputs for audio. Even worse, you won't get surround sound audio through it anyways. The Wii U outputs surround sound in an uncompressed format (LPCM), and the optical cable can only support a two - channel LPCM signal.
Why is audio output restricted to HDMI only? - Wii U ...
https://www.giantbomb.com/wii-u/3045-139/forums/why-is-audio-output-restricted-to-hdmi-only-567724/
There is no optical port so users will have to run an HDMI cable from the Wii U to a compatible receiver and from there to the TV if they want full high definition and surround sound. Otherwise, you can run analog stereo sound out of the standard AV multi out." So they didn't say that you could run composite audio with HDMI video.
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