I opened up Photo Booth to record a video for YouTube today and realized that I had recorded my self for 7 minutes for almost no reason. Photo Booth doesn't seem to be detecting my microphone at all, because when I play the clip i recorded, there is no sound. My speakers are on, trust me. Also, other audio recording applications, such as Screenflow and Audacity are able to pick up the microphone easily. I've ran the application with nothing else running and get the same result. Does anyone have a solution? Thanks in advance.