There's a truckload of "how do I record audio" threads here, most of it boils down to:
- If you don't hear any audio (volume slider is disabled) install DirectX
- If game audio isn't being recorded (just microphone, or silence) check the audio settings. You want something called "stereo mix" or similar that combines audio sources.
- Sometimes it's hidden by default and you have to enable it first from the control panel. http://downloadsquad.switched.com/2007/01/15/how-to-enable-wave-out-recording-in-vista
- Sometimes updating your sound driver will help (use a proper OEM driver for your sound card instead of generic, built-in Windows driver).
- If that doesn't work, virtual-audio-cable type software can help. Something like this
- Last resort - other screen capture software might work better for you (OBS, FRAPS, Dxtory, Bandicam, XSplit, Camtasia, VirtualDub, Mirillis, ........)viewtopic.php?p=6853#p6853
I saw the other topic with the guy talking about the included audio cable.. I didn't have one but that topic is a couple years old and I figured maybe it doesn't need one now but I just wanted to mention that in case because I'm just totally confused.
The "included audio cable" (actually noise filter) was included before USB audio capture was implemented, when you had to record game audio from the 3DS headphone jack. The noise filter removed extra static noise caused by interference from the USB port. If you want one of these (esp. for Mac recording, the beta mac software doesn't have USB audio capture), search for "3.5mm ground loop isolator" or Kensington K39203US.