An audio reproduction apparatus capable of modulating an audio signal with at least one of reproduction factors, including the speed and direction of reproduction, and the sound pressure of the audio signal, an audio reproduction method used by the audio reproduction apparatus, a remixing apparatus employing...http://www.google.com.au/patents/US6687193?utm_source=gb-gplus-sharePatent US6687193 - Audio reproduction apparatus having audio modulation function, method used by the apparatus, remixing apparatus using the audio reproduction apparatus, and method used by the remixing apparatus
