Hello. I am just in the design process for a small app i am creating. I am trying to find out how to use the Iphone's mic as an input device so that the sound it receives causes an action on screen. (Not dissimilar to when you blow out fire on Zelda on the DSi.) I think that it is simply acting on the signal that would normally amplify the sound. Having spent time looking at the AV classes in the documentation, is it the AVCaptureInput that will help me? If not, please point me in the right direction. (i.e. What class should i be thinking about to do this specific job.) Probably a simple fix for many, but a first for me. Thanks.