Whenever I select (Use Device Audio) or AverMedia as the Audio Input Device, I get a continuous scratching noise.
Whenever I select Realtek Digital Input or Microphone, I get nothing.
I tried using the Open Crossbar with the settings you posted, and all I'm hearing is scratching. (I am getting video though)
EDIT: I got the sound to work, but it works because, on my PS3, I went to the audio settings and checked all of the boxes, (I have no idea what they are for).