SABERWOLF
When I play one of my 3D movie files with MPC-HC & MPC-HC running, AviSynth writes some script to ffdshows Audio decoder that looks like this.
so just turn off SVP - "Settings" -> "Disable SVP"
Which makes my 3D movies look like this.
it's wrong
probably you just need to set "Stereo mode" option in SVP to the proper value