PROBLEM TO BE SOLVED: To provide an expression reproduction system that promotes repetition of the operation suitable for a user, and thereby supports rehabilitation, etc.SOLUTION: A performance system 10 sets a specific fingering suitable for a user (for example, the position 1→5→2→4→3) by using keys K1-K5 of a board device 20. The reproduced musical tone row data is loaded from data cards, etc. If it is an Education Ministry song "hometown", the tone row corresponding to the lyrics "the mountain having chased a rabbit" is "CCCDEDEEFG". In the board device 20, the fingering data and tone row data are used, and a routine table 86 is generated in which a reproduction order of sound divided every one sound is associated with multiple operation contained in one routine according to the routine repetition number of times. When the user performs a predetermined fingering, the board device 20 refers to the routine table 86, and specifies and outputs a corresponding sound from the sequential orde
