Abstract: 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.

Abstract: The present invention provides a recording medium reproduction apparatus that can continuously reproduce different tunes from recording media at the same numbers of beat and the same beat timing. The recording medium reproduction apparatus includes: a first recording medium reproduction unit; a second recording medium reproduction unit; and a control unit that compares the number of beats per unit time of a tune reproduced from a first recording medium with the number of beats per unit time of a tune reproduced from a second recording medium, and adjusts the reproduction rate of the second recording medium reproduction unit so that the number of beats per unit time of the second recording medium reproduction unit becomes equal to the number of beats per unit time of the first recording medium reproduction unit.

Abstract: A pair of glasses is provided with an attachment mechanism including a mount groove formed in an end portion of the glass, a lower portion of the mount groove being defined by a converging wall, a mount element provided at an end of the frame member, a fastening device which fastens the frame member on the glass by way of the mount element, and a retaining projection formed on the frame member near the mount element. The retaining projection has a leading end which comes into contact with the converging wall of the mount groove at least two or more points when the frame member is fastened on the glass by the fastening device.

Abstract: A recording medium reproduction apparatus is provided, which apparatus includes: a reproduction instruction unit which inputs instructions on a direction and a rate of a scratch reproduction of a recording medium; a data storage unit which stores data read out from the recording medium, the data being separated by a reference position at which the scratch reproduction is started into first and second halves each having a predetermined time length; and a scratch reproduction system which reads and reproduces the data stored in the data storage unit in accordance with the instructions input by the reproduction instruction unit.

Abstract: A pair of glasses is provided with an attachment mechanism including a mount groove formed in an end portion of the glass, a lower portion of the mount groove being defined by a converging wall, a mount element provided at an end of the frame member, a fastening device which fastens the frame member on the glass by way of the mount element, and a retaining projection formed on the frame member near the mount element. The retaining projection has a leading end which comes into contact with the converging wall of the mount groove at least two or more points when the frame member is fastened on the glass by the fastening device.