So I am trying to setup a home made karaoke system. I am using my MacBook Pro 2021 audio output going via a Behringer XENYX 802 8 Input mixer and then going via RCA to a Denon AVR-X2400H AVR to the 4 analog input (CD) via RCA. I then connect my MBP HDMI output to the Denon front HDMI input (AUX1/FRONT) and I configure my inputs correctly in the Denon Inputs menu setting both the correct HDMI and analog inputs. So if I set the input in the remote control to the front HDMI the sound from the MBP plays fine but if I then connect the HDMI cable to the AVR the sound drops and I can set my MBP screen. Basically I can either see the HDMI video from the laptop (if the HDMI cable is connected) or the audio output (if the HDMI cable is NOT connected), but not both at the same time. Am I doing something wrong? Can't this receiver mix the HDMI input from the MBP with the analog audio input via RCA? Thanks!