Audio pass through

[kjell.bjornfors]

Is it possible to get multichannel pass through from hdmi to optical output on Wiim Ultra. E.x TV program in 5.1

 

[Brantome]

See Post in thread 'WiiM Ultra'
https://forum.wiimhome.com/threads/wiim-ultra.1731/post-52110

 

[Mr Ee]

Optical, no.
From ultra q&a

Will it be possible to route multichannel HDMI input to multichannel USB output (e.g., 5.1 channel)

Our system currently supports only two-channel audio for both HDMI input and USB output. However, our team is exploring options to enable multichannel support for routing HDMI input to USB output.

Which is at odds with this one (where I believe it's referringt to a 5.1 signal coming in to the ultra's hdmi port

Will the Ultra support multichannel music output on the HDMI port? If not, thats a big miss for a premium product

Yes, it supports Dolby Digital 5.1 audio.

 

[s3igell]

Which is at odds with this one (where I believe it's referringt to a 5.1 signal coming in to the ultra's hdmi port

Will the Ultra support multichannel music output on the HDMI port? If not, thats a big miss for a premium product

Yes, it supports Dolby Digital 5.1 audio.

It's pretty Clear that the WiiM FAQ writer was talking ONLY about Multi-channel Input, as Ultra has only HDMI-ARC Input and no HDMI-Out (hence no "multichannel music output on the HDMI port").
And to date, WiiM hasn't given any detail on support for any format but Dolby Digital 5.1; nor any explanation on how 5.1 is converted to 2.0; or if the .1 LFE channel is preserved or if Sub Out on the Ultra and Amp is simply the EQ Lowpass Filter.

 

[PeliPelmeni]

Btw. I have made good experiences with passing dolby digital and dts surround sound through ultra via dts or dolby encapsulated in flac compressed wave files. This works because with no eq and 100% fixed volume the Ultra is 100% bit transparent. You can extract and encode such files e.g. from DVD, multi channel flac or whatever with audiomuxer https://www.videohelp.com/software/AudioMuxer. For the ultra it looks like an other flac file but your receiver can decode the dolby digital or dts sound from this. This is working very well with very good sound quality(DTS). Even DTS96/24 is possible. But it would be nice if the ultra could recognize such files and then put the volume to fixed 100% and revert the eq-settings back to normal, otherwise you will here only garbled sound. Best regards...

 

[s3igell]

Btw. I have made good experiences with passing dolby digital and dts surround sound through ultra via dts or dolby encapsulated in flac compressed wave files. This works because with no eq and 100% fixed volume the Ultra is 100% bit transparent. You can extract and encode such files e.g. from DVD, multi channel flac or whatever with audiomuxer https://www.videohelp.com/software/AudioMuxer. For the ultra it looks like an other flac file but your receiver can decode the dolby digital or dts sound from this. This is working very well with very good sound quality(DTS). Even DTS96/24 is possible. But it would be nice if the ultra could recognize such files and then put the volume to fixed 100% and revert the eq-settings back to normal, otherwise you will here only garbled sound. Best regards...

Are you needing to use specific settings or metadata to flag these passed-thru files as "2-channel"?? Or are you saying that "flac in equals flac out" if you simply defeat EQ and Volume Trim?? (And therefore use the Ultra as a SPDIF-to-USB Transport only??)

 

[PeliPelmeni]

Are you needing to use specific settings or metadata to flag these passed-thru files as "2-channel"?? Or are you saying that "flac in equals flac out" if you simply defeat EQ and Volume Trim?? (And therefore use the Ultra as a SPDIF-to-USB Transport only??)

No special handling required. After using AudioMuxer files are normal 2 channel flacs or wavs which transport the dd 5.1 or DTS Stream. You can tag them with cover etc. just like normal flacs. Some time ago you could buy so called DTS-CD´s https://de.wikipedia.org/wiki/DTS-CD there the same procedure is used (but only with PCM WAV). In audiomuxer you just have to select DTS-WAV and install the free DTS-ENCODER ffdcaenc (https://forum.doom9.org/showthread.php?t=170952