How to passthrough DTS/DD/PCM through the HDMI

[rikardo1979]

so as you are sure that you have all settings as it should and also your files include DTS sound than you would need to change your AVR settings as if RPi jus passing sound out with out touching, it means you cant set the volume for the channels or even you cant adjust the volume at all.
So you should be able to enhance volume of your central channel on your AVR, im pretty sure