Patent ID: 8755531

Claim:
An audio system for processing a multi-channel signal comprising: a receiver for receiving the multi-channel signal and producing a plurality of channel signals corresponding to respective ones of said channels and having predetermined bandwidths; a first controller for generating a first drive signal for a first sound emitter by combining all of the plurality of channel signals, the first drive signal including a signal component contribution from each of the plurality of channel signals and having a first bandwidth collectively including the predetermined bandwidths of the channel signals; a second controller for generating a plurality of second drive signals for respective ones of a set of second sound emitters, each of the second drive signals being generated from a single one of the plurality of channel signals, said second drive signals collectively having a second bandwidth that overlaps part of the first bandwidth and has a lower cut-off frequency that is higher than a lower cut-off frequency of the first bandwidth; said first controller including a delay processor for introducing a delay for at least one signal component of the first drive signal relative to a corresponding signal component in at least one of the second drive signals, said delay processor being adapted to adjust said delay to ensure that sounds transmitted from the second sound emitters reaches a listener before corresponding sounds from the first sound emitter; where the lower cut-off frequency of the second bandwidth is higher than 950 Hz for a 3 dB gain attenuation relative to an average gain for a frequency band extending 1 kHz above the lower cut-off frequency of the second bandwidth.