To simply operate a broadcast receiver whose operation function is set via an operation member and to save the material to be used and reduce the manufacturing cost.

An operation function is set and adjusted via an operation member 5. Different acoustic signals are assigned to various operation functions of the broadcast receiver 1. In this case, the acoustic signal is continuously reproduced and the operation member 5 is used to set and adjust the operation function assigned to the acoustic signal that is reproduced at present. In this case, the sound frequency of each acoustic signal is made different from each other. Furthermore, the sound by the acoustic signal is reproduced.