PERFORMANCE SYSTEM AND COMPUTER PROGRAM

PROBLEM TO BE SOLVED: To provide a performance system that allows easier visual comprehension and easier operation even for those less skilled in playing musical instruments.SOLUTION: A performance system includes mode selection means 110, 120, 130-1 through N for selecting a performance mode, and sequence generation means that automatically generates an input sequence being a sequence of abstract musical tones or a sequence of abstract chords. Further, the performance system includes performance control means that converts the automatically generated input sequence, in accordance with a corresponding function previously set to the performance mode, to an output musical tone being at least one unit or a sequence of concrete musical tones to be audio-outputted to outside so as to generate and output a performance signal indicating the converted output musical tone, and audio output means that outputs the generated and outputted performance signal, an audio signal synthesized from the performance signal or a sound generated from the audio signal.