Just helping a friend to set up formuler S mini and have encountered the following issues below, please any solutions will be very well appreciated.

A) this is currently connected via HDMI to a 5.2 AV receiver , the receiver has 5 speakers and a subwoofer, however the audio only comes out from the centre speaker, i have tried all the setting changes, swapped HDMI cables and ports on the AV receiver still no joy

B) There is a narrators voice on movies and i cant find a way to turn this off.

C) Does this Have ABM please? this is a deal breaker as scrolling through thousands of channels is annoying, if no ABM any work around please.