So I'm not sure why it does this. When I use the record Window so I can record something on my desktop? Yes.. it stop recording sound after 1 minute of recording. IT keeps recording video but stop picking up the sound. I don;t have this problem while recording a game or a video that it can just record on it's own... just when I record using the window. I recently made a video because I'm having Skype issues, and it recorded me up to about the end.. then cuts out.....
https://youtu.be/kNxn_wgndvg?t=1m10s
Right around this mark it stop recording the sound. I'm clueless as to why.