The stick spec says it support HDMI 1.4a, but according to the HDMI standards say it is an optional feature and the manufacture has to confirm the support. Does had the experience regarding the ARC with Compute Stick. Comments appreciated..
The HDMI version 1.4a provides support for ARC, however; since the Intel® Compute stick integrates the Intel® HD graphics will not handle ARC.
You can confirm this information here: What are the differences between different HDMI versions?