Ok i was out at and i saw someone using a recorder of some sort you plug it in ur laptop and it starts recording wat ever noise there is. this guy was using it at a lecture. This person was then able to listen tot he recording and delete parts if he wanted to when he was done recording. I was hoping if someone would be able to tell me the name of something like this please.

You can try the software "mp3 my mp3" It records all audio the computer makes. you can also choose to record audio from a microphone.