Hello. I have a Yamaha RX-V385 receiver. When I set the DSP program to Straight and watch surround sound content on Netflix (via Chromecast), I get audio in the surround channels as expected. However, when watching a surround sound blu-ray, I don't get audio in the surround channels unless I switch the DSP setting to "Sur. Decode". The blu-ray audio is usually DTS-HD MA 5.1, which my disc player and receiver both support. Yet, I only get audio from the front speakers (unsure about the center speaker) when using the Straight setting. Is this how the setting is supposed to work, and if not, what's the issue? Thanks.