47. The audio system of claim 38 , wherein the filtered volume determiner comprises a filter coupled to a peak detector, and wherein the filter is configured to receive the first signal and generate a filtered signal, and wherein the peak detector is configured to receive the filtered signal and generate the second signal.
47. The audio system of claim 38 , wherein the filtered volume determiner comprises a filter coupled to a peak detector, and wherein the filter is configured to receive the first signal and generate a filtered signal, and wherein the peak detector is configured to receive the filtered signal and generate the second signal. 48. The audio system of claim 47 , wherein the filter comprises a high-pass filter or a band-pass filter.