A processing circuit may comprise an adaptive filter having a response generating an antinoise signal from a reference microphone signal, a secondary path estimate filter modeling an electroacoustic path of a source audio signal, a biasing portion that generates a scaled antinoise signal by applying a scaling factor and the response of the secondary path estimate filter to the antinoise signal, and a coefficient control block that shapes the response of the adaptive filter in conformity with the reference microphone signal and a modified playback corrected error signal by adapting the response of the adaptive filter to minimize ambient audio sounds in the error microphone signal, wherein the playback corrected error is based on a difference between the error microphone signal and source audio signal and the modified playback corrected error signal is based on a difference between the playback corrected error signal and scaled antinoise signal.