I have the following equipment.
1. TCL Roku 6 Series 4K smart TV
2. Logitech z906 surround sound system
I have connected my TCL TV to the logitech z906 via a digital audio cable (THERE IS NO HDMI on the z906)
The Logitech z906 system has dolby DTS and a "3-D effect" for stereo sound.
My TCL...