Patent ID: 7412380

Claim:
A method for modifying an audio signal comprising a plurality of channel signals, the method comprising: transforming at least selected ones of the channel signals into a time-frequency domain; comparing said at least selected ones of the channel signals in the time-frequency domain to identify corresponding portions of said channel signals that are not correlated or are only weakly correlated across channels; and modifying the identified corresponding portions of said channel signals, wherein the step of modifying comprises: determining for each channel an input ratio in which the numerator comprises a measure of said portions of the channel signal that are uncorrelated or weakly correlated and the denominator comprises a measure of the overall channel signal; receiving a user input indicating a desired output ratio of uncorrelated or weakly correlated portions to total signal; and applying to said portions of said channel signals that are uncorrelated or weakly correlated a modification factor calculated to modify the channel signals as required to achieve the desired output ratio indicated by the user.