I recently purchases the Roxio Game Capture HD Pro and to record my in game voice I was told to us Audacity. Does anyone know how I would set this up?
To edit the audio on a video* you’ll need a video editor. Audacity is just an audio editor.
[* be it screen capture and any other video with sound]
Presumably you are recording your voice with a microphone so you will have to set your mic as the input in Audacity’s Device Toolbar .
We don’t know the Roxio hardware though - it seems to have left and right audio input, You should read its instructions or ask on their Forum, too:
Tell them whether you are trying to record just the game sound or your voice as well.