I have MO 4Media installed on 2 Shields. The first Shield is connected via HDMI to a Marantz SR7015 receiver, and the second Shield is connected via HDMI directly to a TV. I have some home movies that play fine, both audio and video, on the Shield connected directly to a TV. However, when played on the Shield connected to the receiver, there is no audio. MO 4Media shows the audio as mp4a-latm (1 channels, und). Tried both Android System and Exo audio player and same results. It makes no difference whether “Decode Unsupported Audio” is checked or unchecked. The key seems to be audio that is 1 channel, as I’ve have lots of home movies with 2 channel audio that play fine.