Abstract: Disclosed is a method for analyzing recorded telephone calls in order to predict business outcomes. The method involves recording a series of initial telephone calls and analyzing those calls for particular audio features. The audio features are tabulated and annotated to specify whether the telephone call resulted in a pre-determined business outcome. A model is then built whereby the pre-determined business outcome can be predicted based upon the presence of certain audio features. The model can subsequently be used to predict whether future calls are likely to result in the pre-determined business outcome.