Not outputting audio correctly

[Adam Morgan2]

At some point recently my Denon receiver stopped getting audio properly from the Shield. No matter what app I try (netflix, google, etc) I am getting two channels of audio. I am also seeing the same issue when running Kodi - I have movies with plain Dolby 5.1 and I am still getting two channels of audio. I've tried all combination of audio settings on the shield - auto, turning them on manually, etc - same result.

I know that my receiver isn't the issue because I can put my raspberry pi running Kodi into the same hdmi cable and play the same movies and I hear the sound as it should be.

If anyone has an idea as to what I can try please don't hesitate to suggest it. Thanks!