I am pretty new to the advanced settings of a surround sound system. I started with an Onkyo 7.1 system and started to upgrade since then. I purchased a Yamaha RX-V377 a couple years ago, then purchased a pair of Polk Audio T15 bookshelf speakers. I was using the polks for surround speakers with the onkyos still upfront for the fronts left, right, center and subwoofer. I am currently in the process of putting the polks up front and purchasing the polk TL3 for back surround. My question lies in understanding HD audio. My receiver supports dolby truehd, and dts hd, but I am having a hard time telling if it is coming through as this. I am playing movies through most of the time the apple tv or android tv or just the cable box. When hitting the info button it always says PCM, I don't think there is a light on the receiver that will notify me that is in an hd audio mode, just a dolby mode. Any suggestions on what I should check within the settings to make sure I am getting the fullest out of my receiver. Thanks.
