no sound hdmi in nvidia shield!!

Hi! i have a 2015 shield

when i connect hdmi (nvidia) to avr yamaha v475 hdmi 2 for example, and another hdmi from sony tv (kdl w828) to avr (hdmi 1). i can see the nvidia correct, but sounds don’t work!! any!!

even i connect nvidia hdmi to sony hdmi and sony hdmi (other cable) to avr yamaha sounds work perfectly, but not dts and dts hd