1. A method of automated adaptation of a language model for transcription of a call center's audio data, the method comprising: obtaining audio data from a plurality of audio files, the audio data corresponding to recorded customer service interactions between one or more customers and one or more customer service agents; transcribing the audio data with a language model to produce a plurality of audio file transcriptions, at least one audio file transcription of the plurality being associated to each audio file of the plurality of audio files; evaluating a quality of the plurality of audio file transcriptions by assigning each audio file transcription a score or value based on the results of the transcribing; selecting at least one best transcription from the plurality of audio file transcriptions based upon the evaluated quality; calculating statistics from the selected at least one best transcription from the plurality of audio file transcriptions; modifying the language model from the calculated statistics; and using the modified language model for subsequent transcriptions of the call center's audio data.