Patent ID: 8054980

Claim:
An audio processor, comprising: a virtualizer configured to process audio information to virtualize at least one speaker such that, from a listener's perspective, sounds appear to come from at least one direction where a physical speaker is not present, the virtualizer comprising: a first feedback crossover path configured to receive, delay, and filter signals output from the virtualizer; and a forward crossover path configured to receive an output of a first filter, to filter the received signal with a filter approximating filtering required to provide an optimal inter-time difference to virtualize the at least one speaker and to delay an output of the filter to compensate for a difference between a delay introduced by the filter and the optimal inter-time difference, wherein an output of the first feedback crossover path and an output of the forward crossover path are combined to produce at least one output signal from the virtualizer; and a controller configured to cause the virtualizer to virtualize the at least one speaker at any location in a space around the listener.