Connecting SPDIF (Optical cable) through PC SoundBlaster Z card

Have you tried the optical SPDIF in and not used the HDMI passthrough?

Like have the TV and Xbox directly connected and have the optical cable from the Xbox to the sound system?

The hdmi in port on the Xbox One is for plugging in TV boxes, not for plugging in soundbars, as the signal goes in, not out. Your best bet is to use a optical spdif cable from the Xbox to your soundbar, if your soundbar supports optical spdif.

I have this headset, you have to use the optical/SPDIF connection and a headset adapter with the wire to the headset for the mic to work. You will need to use the USB connection only to power the Soundblaster wireless unit. With the headset configured
this way it is the same as if the XBoxOne were hooked up to a digital stereo receiver.

Verify your system's audio settings are set for Optical use, you can gather how to do this from here:

support.xbox.com/.../configure-audio-settings

Other things to consider are: make sure you have a good charge, the wireless syncs up with the headset, you may need to toggle the switch PC for this configuration.

if you are still having issues please test the headset with another device such as an iPhone/iPod (yes it will work with 3.5mm Optical) or a PC.

Hope I helped!

- Ramos

Kingston HyperX Cloud Revolver. It is wired to the computer via 3.5mm. I also have a set of Sennheiser Game One's that do not work either and are also wired to the PC. Again, all have no issues with other voice related programs.

I am using a Soundblaster Z sound card if that makes a difference.

The Xbox One X doesn't have a soundcard, in a way a PC would have a Creative Labs SoundBlaster card for example.

The Xbox One does all sound processing on the main CPU so to speak.

However, the clearer sound when you connect the Xbox to your soundbar directly can have other reasons than the "soundcard".

I assume you had your soundbar, TV and console set up like this:

Xbox One Console-->HDMI Cable-->TV-->Optical Cable-->Soundbar.

While the console transmits multi-channel surround to the TV, the TV might only transmit Stereo to the soundbar.

A lot of TVs only forward Stereo Sound through an optical cable, if the video feed comes from an external source. Only "internal" video streams that come from the TV's own tuner or media being played through the TV's USB Media Player will be transmitted
in multichannel audio to the sound bar.

By connecting the Xbox directly to the soundbar, the soundbar will get the original multi-channel sound from the console, instead of the stereo downmix from the TV.

So I assume your setup now looks like this:

Soundbar<-- Optical Cable<-- Xbox One -->HDMI cable--> TV

Right?