An audio editing apparatus for playing back an optical disc such as a CD is provided with a rotatable jog dial, detecting device for detecting the amount...http://www.google.com/patents/US7394731?utm_source=gb-gplus-sharePatent US7394731 - Information playback apparatusAdvanced Patent SearchPublication numberUS7394731 B2Publication typeGrantApplication numberUS 11/401,327Publication dateJul 1, 200