1. A method of deploying a temporal noise shaping filter for use in processing audio signals, the method comprising: calculating a temporal noise shaping filter for each of a plurality of frequency bands; determining a distance between coefficients of temporal noise shaping filters in adjacent frequency bands; merging ones of the temporal noise shaping filters with a shortest distance between coefficients; clustering the temporal noise shaping filters into at least two groups based on energies in each of the frequency bands covered by the filters; and using a centroid of each of the at least two groups as a final temporal noise shaping filter for a plurality of frequency ranges covered by each respective one of the at least two groups.