Abstract: A music playback unit corrects the frequency characteristics of a speaker installed in a portable telephone, without using an equalizer. The musical score data is stored in a first memory, and data for correcting the velocity of musical score data for each velocity of each note is stored in a second memory. The sound generator driver reads the musical score data from the first memory, and reads the correction data from the second memory, and also corrects the velocity of the musical score data by substituting the musical score data and correction data in a predetermined calculation formula. The musical score data after the velocity is corrected is played by the MIDI sound generator, amplifier and speaker.

Abstract: A music playback unit for correcting the frequency characteristics of a speaker installed in a portable telephone, without using an equalizer. The musical score data is stored in the SMF memory, and data for correcting the velocity of musical score data for each velocity of each note is stored in a DB memory. The sound generator driver reads the musical score data from the SMF memory, and reads the correction data from the DB memory, and also corrects the velocity of the musical score data by substituting the musical score data and correction data in a predetermined calculation formula. The musical score data after the velocity is corrected is played by the MIDI sound generator, amplifier and speaker.

Abstract: There is described a hand-held game machine including a box which is rectangular when viewed from above, a built-in battery, a game control section driven by the power supplied from the battery, and a flat display. In the game machine, the flat display is arranged substantially in the center of the surface of the box; a key entry switch is provided on one side of the longitudinal center line of the flat display; and one end of a loop string is connected to at least one corner of the box on the same side as that on which the key entry switch is provided, wherein the length of the loop string is set so that the player can place his fingers at the operating position of the key entry switch while the loop of the loop string is wrapped around at least the flat portion of his hand.