Patent ID: 8160278

Claim:
A method that automatically mixes a first audio signal and a second audio signal; comprising: determining whether the first signal and the second signal are correlated according to a predetermined correlation criterion, and if the predetermined correlation criterion is fulfilled, determining whether the first and the second signal are delayed with respect to each other; compensating for a delay of the first signal or the second signal; and mixing the first signal and the second signal, where the first signal or second signal includes a compensation; where one of the first signal and the second signal is selected as a reference signal and the other signal is selected as a comparative signal; and where determining whether the signals are correlated comprises: providing an adaptive filter that selectively passes portions of the reference signal; where the adaptive filter is configured such that the difference between the reference signal and the comparative signal is minimized according to a predetermined criterion; determining a maximum value of the absolute values of the filter coefficients of the adaptive filter; determining whether the filter coefficient position of the maximum value and the positions of a predetermined number of previously determined maximum values deviate at most by a predetermined threshold value from each other; and where the first and the second signal are designated to be correlated when the positions of the maximum values deviate at most by the predetermined threshold value from each other.