MS44

Hi. I know that many people use debut video capture to record video and they miss the audio. I read many topic and response and now I understand what I do wrong. My question is: Is possible to recover in a video a missing audio? Or the audio is lost forever? When I recorded the video I was my my headphone with the the wire of the microphone not in the pc (not attacked) I really know if is possible to recover the audio missing, maybe there are some programs on line thank you