I put in my ceiling speakers, I have 11 channels of amplification (minimum of 200 watts per). I have a Marantz AV7704 and I want to hear what everything will do. Sources attached to the system include; Sony XBR75X900F Xfinity X1 DVR. Sony BDP-S370 An older HP desktop with HDMI out running windows 7. A newer HP Notebook with 4k/HDMI with Windows 10. I tried some Dolby and DTS-X MKV demo files on my notebook attached to the AV7704 via HDMI and got video and no audio from the movie player. I downloaded VLC Media player and tried the MKV files, and got audio. But the AV7704 only showed stereo input from the computer. I am looking for ideas on how to make the computer output the digital stream so the sound processor can interpret all the channels. Anyone done this before?