5.1.atmos not working with MPC-HC, EAC3 Joint object coding, dolby digital plus

Good day

I am new to MPC-HC and trying to play a movie with a 5.1.atmos stream. I have a simple 5.1 channel receiver and would like to use the 5 channels on the receiver to play on my bed layer using an HDMI from my PC to the receiver, but I am struggling to find a way to output atmos. Is it possible to send the 5-channel bed layer sound through HDMI and simultaneously send the atmos channels through an aux output on the PC?

Under properties->details, the audio section says that it is DD+, eac3, and only 6 channels, 5.1(side).

Thank you kindly for your assistance.

Only way to send Atmos to receiver is to have a compatible receiver.