Does your laptop pass HD codecs with USB-C to HDMI dock?


Novice Member
I have a laptop (Thinkpad 14 Gen1 AMD): when connected to the AVR with the onboard HDMI it can bitstream compressed codecs (AC3,EAC3,DTS) as well as HD codecs (TrueHD, DTS-HD MA). If the contect contains Atmos it appears at the AVR so the passthrough is working.

Now when I connect to the AVR via HDMI/USB-C through the USB-C Gen2 dock the HD codecs don't passthrough. The player (mpv, in this case) sends a Stereo downmix as if the "hardware" (sound device driver?) has indicated it doesn't support TrueHD or DTS-HD MA.

This could be due to quirks in the Linux/Alsa handling of USB-C to HDMI transition: just wondering if you have passthrough of HD codecs via USB-C to HDMI docks.


Well-known Member
From my understanding USB-C is outputting Display Port so your dock either has its own video chip or is doing HDMI conversation or its level or DP is not high enough.

The latest video from AVForums

Maverick UK Premiere IMAX Review + Top Gun, Tom Cruise, Tony Scott and 4K + Movie/TV News
Subscribe to our YouTube channel
Support AVForums with Patreon

Top Bottom