How do I use fiest generation fire tv box with projector and get audio when movie is playing

[marycay401]

Connected fire tv box via hdmi to projector. Video works fine, movie trailers on Amazon Prime work fine, including Audio. When I select movie to play the video works fine, but no audio. Projector has it's own external speaker that is wire connected or Bluetooth. Used wire connected

 

[kanewolf]

I bet the projector can't decode surround sound. Set the audio to PCM mode on the Fire TV box.