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temporal resolution

I've posted this message to the music-dsp list so apologies to anyone who recieves it twice (should have posted it here in the first place since its more appropriate).
Consider the case where an audio signal is filtered into subbands and each subband is passed through a delay (of different duration for each subband) before recombination of subbands to produce a new signal. What would be the maximum permissible difference between the maximum and minimum delays so that the new signal is perceptually equivalent to the original?

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