I had recorded about 4 long clips of gameplay for use in a YouTube video, however, only 3/4 of those clips had audio, the 4th clip was 4 hours long and when I tried playing it on VLC to make sure it worked correctly, there was no audio, at first I thought it was just a bug with VLC, then I tried putting it in a video editor and the video part was fine but the audio was just a straight line, and of course, no audio.