I have a similar problem.
Logilink vg0001a video grabber on Windows 8,1. Honestech software works (audio and video) but gives an ugly result.
Debut software : nice video but no audio at all : not on the speakers, not in the recording. When I tap on the laptop while recording this noise can be heard in the recording. The noise disappears when the audio from the microphone or the speakers is disabled.
I tried restarting Windows and/or Debut several times, changing all possible audio settings, but nothing works .
I think the driver simply doesn't process the audio, or takes the audio only from the microphone or the speakers.
