Abstract: A method of panning includes panning an input signal or a low frequency portion of the input signal to split the input signal or the low frequency portion of the input signal into first and second channels, panning the input signal or a high frequency portion of the input signal to split the input signal or the high frequency portion of the input signal into third and fourth channels such that localization of the high frequency portion of the input signal coincides with localization of the low frequency portion of the input signal.

Abstract: A method of panning includes panning an input signal or a low frequency portion of the input signal to split the input signal or the low frequency portion of the input signal into first and second channels, panning the input signal or a high frequency portion of the input signal to split the input signal or the high frequency portion of the input signal into third and fourth channels such that localization of the high frequency portion of the input signal coincides with localization of the low frequency portion of the input signal.

Abstract: The enhancement processor disclosed herein includes left and right channels through which the components of the stereo signal are fed, and a side channel that receives a difference signal derived from the main left and right channel signals. The side channel difference signal is shifted in quadrature, (e.g. + or -90.degree.) relative to the main channels of the processor, adjusted by a variable gain control, low pass filtered and added back into the main left and right channels prior to the stereo outputs. Further enhancement is achieved in the processor by combining with the above effect, a gain adjusted anti-phase cross-feed between the main left and right channels to produce an image-widening characteristic that compensates for some undesired image alteration resulting from the quadrature shifted side channel.