Hi Bruce

Thank you for the response. In Fire TV Stick, there are four possible settings.

Dolby digital plus – automatic
Dolby digital plus – off
Dolby digital Plus over HDMI
Dolby digital over HDMI

Except, Dolby digital – off option, which will provide 2 channels stereo so PLII Movie mode in 861, no option provide 96k play.

Is the Fire TV Stick not able to play 96k or am I missing something?

Thank you

Room1 - 861v4, HD621, 7000, 5200HC, 3100, Oppo BDP83, MS600, MD600.
Room2 - DSP5200.2, MS200, Rythmik Sub, G68D, HD621