I've had to go through my audio settings on my laptop and make sure it was set to output 5.1 and make Marantz my default. I've had multiple issues with getting sound tho and have spent up to an hour of frustration figuring it out. Audio settings on my pc kept reverting and/or changing...
Oh boy, I'm remembering now. There's definitely a steep ass learning curve, lol. I'd have to get all my stuff out and set it all up to remember everything.