Yesterday managed to load the new firmware on my 8500. Took about 25mins. First thing, i load the dts x demo disc, on the sound processor display there is no dts x pro indication. Just dts x MSTR. Scroll through the sound processor selector no dts x pro.
But i did noticed that all 6 height spks are being engaged. Before the firmware upgrade, only dolby atmos will tend to engage fh, top middle and rh but not dts x. Now with the new firmware dts x content is able to do so. Sound stage is also much more engaging.
Will report more during weekends testing.