Hello. I use the Sena Prism Tube camera on a motorcycle helmet. I don't attach the external microphone as I don't need to record any voiceover. However I know the camera still records audio through some device - presumably a built in microphone? Two questions: Where is the inlet on the camera body that records audio and is it possible to stop audio recording? Asking as I want to reduce the wind noise on the camera when using it riding.