1. A computer implemented method, comprising: identifying, by a system of one or more computers, a key phrase that includes one or more words of interest; processing an audio file by a phonetic search engine of the system to identify a plurality of phrase occurrences in the audio file, wherein each phrase occurrence of said phrase occurrences is representative of one or more words spoken by said at least one speaker and stored in said audio file; selecting, by the system, a candidate phrase occurrence from said phrase occurrences, wherein said candidate phrase occurrence is a potential match for said key phrase; identifying, by the system, a confidence level for said candidate phrase occurrence, wherein said confidence level is based on the likelihood that said candidate phrase occurrence matches said key phrase; and providing, by the system, a graphical representation for display by an application executing on one or more of the computers of the system or executing on an additional computer, wherein said graphical representation includes a time axis representative of time passage in said audio file and a fiducial marking along said time axis; wherein said fiducial marking is presented along said time axis at a time associated with the occurrence of said candidate phrase occurrence in said audio file based on identifying said candidate phrase occurrence in said audio file; and wherein a magnitude of a visual magnitude characteristic of said fiducial marking is determined based on said confidence level of said candidate phrase occurrence; determining an emotional characteristic of said speaker in said audio file, said emotional characteristic indicative of said speaker experiencing a particular emotion; selecting a second candidate phrase occurrence from said phrase occurrences different from said candidate phrase occurrence, wherein said second candidate phrase occurrence is said potential match for said key phrase; identifying a second confidence level for said second candidate phrase occurrence, wherein said second confidence level is based on the likelihood that said second candidate phrase occurrence matches said key phrase; wherein said graphical representation includes a second fiducial marking along said time axis, wherein said second fiducial marking is resent along said time axis at a second time associated with the occurrence of said second candidate phrase, and wherein a magnitude of a characteristic of said second fiducial marking is based on said second confidence level of said second candidate phrase occurrence in said audio file; said second fiducial marking and said fiducial marking are visual representations of the instances of respective said second candidate phrase occurrence and said candidate phrase occurrence on said time axis of said audio file.