PURPOSE: To facilitate the operation of displaying a set picture of a KARAOKE device and to freely execute a setting change of effect increase factors at need by displaying the set picture by operating a prescribed set key provided on a front panel.

CONSTITUTION: A set key 6 is used to request the start of the specification of a music number and a display of a set picture on a display device 9, and when it is, for instance turned on, it is grounded and when it is turned off, it is not grounded. In the case while the key 6, which is positioned at a position in a front panel easy to operate by a hand, is pushed, a power supply switch 20 is turned on, or the key 6 is continuously pushed for a prescribed time or the key 6 is repeatedly pushed prescribed times, a set picture is displayed. Thus, a set picture is displayed by operating the key 6 located on the front panel of an acoustic control unit 22 of a communication KARAOKE device and the switch 20.