Having problems with audio on my freshly purchased Roku Ultra. The audio sounds very muted like it is from far away. I have tried almost every different audio setting combination on the Roku. The Roku's HDMI cable is going into a port on my Onkyo TX-NR676. I have an LG 75uk6190pub TV and audio is getting back from the TV to the Onkyo via ARC. Not experiencing any sound problems with any other device on the setup. Any thoughts on a fix or things I could try? Thanks for any help!!