7. The method as claimed in claim 6 wherein monitoring the audio source includes receiving the command to begin monitoring the audio source.
6. A method of operation of a navigation system comprising: monitoring an audio source for communicating a broadcast transmission from radio, television, or the internet; capturing an audio segment from the audio source for capturing a portion of the broadcast transmission based on a command from a user; converting the audio segment into a text segment with a control unit implemented as hardware; parsing the text segment for an information segment for estimating an act of the user in response to the broadcast transmission; performing a guidance function based on the information segment for displaying on a device; and tracking the guidance function, determining the number of times the guidance function is performed as a response to the information segment.