DTS/Surround5.1 output via MHL usb to hdmi not working, only stereo, why?

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Spixe1

Senior Member
Mar 20, 2009
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I'm using a LeTV x900 (or Le Max), which sports the Snapdragon 810 as well as USB Type C.

I'm using a USB-C to HDMI MHL adapter (made specifically for this brand of phone) to output audio to my yamaha receiver, as I want to listen to DTS tracks on my home stereo. The receiver sees the HDMI signal from my phone. I use MX Player, which plays the DTS tracks fine (I have the one with DTS support and the right codecs installed), which plays the files just fine. Yet for some reason the receiver is only receiving a stereo signal, so its only giving me 2.0 sound, not see any more than 2 channels in the first place. I'd like to at least play 5.1 (if not 7.1) files. I can't for the life of me figure out what step I'm missing. I even went so far as to install Dolby Atmos on android but that was a no go too. Any ideas?