Patent ID: 8306232

Claim:
In a stereo sound entertainment system, apparatus for digitally controlling, during playback, in accordance with listener input, the composition of a pair of pre-recorded stereo separated audio signals, the apparatus comprising: (a) a digital mixer configured to: (i) receive two pre-recorded stereo separated, digital audio signals; (ii) combine a portion of a first digital audio signal of the two pre-recorded stereo separated digital audio signals with a portion of a second digital audio signal of the two pre-recorded stereo digital audio signals to create a first mixed signal; and (iii) combine a different portion of the second digital audio signal with a different portion of the first digital audio signal to create a second mixed signal; and (b) a listener controller coupled to said digital mixer configured to independently control, in accordance with listener input: (i) the portion of the first digital audio signal combined with the portion of the second digital audio signal; and (ii) the different portion of the second digital audio signal combined with the different portion of the first digital audio signal.