Okay, let me explain what's going on. I used the OP's guide to set everything up, but didn't install reclock. I have an HDMI cable running from my pc, to my Denon. I right click on my desktop, choose screen resolution, and then under "multiple displays", I choose "extend these displays". I double click on an MKV, and drag the movie onto my tv screen. The front of my receiver says "Multi Ch In", which tells me it's PCM being sent to the receiver. When I go to Control Panel/ Sound, my Denon shows up in there. Last night, when I tried to bitstream, I opened the LAV audio settings, and put a check mark in all the audio formats in the bitstreaming section. Most of my MKV's bitstreamed fine, and showed the audio format on the front of the receiver, but some of them didn't play any audio. The ones that didn't play audio, didn't have the LAV audio icon in the system tray. All the MKV's that played fine, had the LAV audio icon pop up in the system tray when I started the movie.