Recording medium reproducing device having tempo control function, key control function and key display function reflecting key change according to tempo change

摘要

A recording medium reproducing device is provided which device varies a tempo and a key of music reproduced from audio data recorded on a recording medium. The recording medium reproducing device comprises means for calculating a variable width of the key according to a varied tempo, means for adding the variable width of the key to a variable width of the key according to a varied key so as to have a summed variable width of the key, and means for displaying the summed variable width of the key.