1. An apparatus, comprising: an audio corpus; transcription data corresponding to the audio corpus; an automatic speech recognition logic coupled to the interface for receiving the audio corpus and interface for receiving transcription data; wherein the automatic speech recognition logic is operable to determine a plurality of speaker clusters corresponding to a plurality of speaker types from the audio corpus and transcription data corresponding to the audio corpus; wherein the automatic speech recognition logic is trained for each speaker cluster belonging to the plurality of speaker clusters; wherein the automatic speech recognition logic determines a selected speaker cluster selected from the plurality of speaker clusters for a source responsive to receiving audio data and a transcription of the audio data from a source; and wherein the automatic speech recognition logic employs the selected speaker cluster for transcribing audio from the source.