1. An acoustic echo cancellation convergence system, comprising: an audio output frequency domain transform that receives audio output data and provides an output of frequency domain audio output based on a frequency domain transform of the audio output data; an audio input frequency domain transform that receives audio input data and provides an output of frequency domain audio input based on a frequency domain transform of the audio input data; an adaptive filter that receives the frequency domain audio output and approximates the true echo; and a differential component that outputs the difference of the true echo approximation and the frequency domain audio input to at least one of a computer application and an acoustic echo cancellation convergence detector.