Patent ID: 8729377

Claim:
A tone control device in communication with a tone generation device to generate a plurality of tones and modify tones, comprising: an input device configured to input tone generation instructions to generate tones with predetermined pitches and to input silencing instructions to silence the tones with the predetermined pitches; an instruction device that outputs tone control instructions to the tone generation device to generate tones or silence tones according to the tone generation instructions and silencing instructions inputted by the input device; and an interval judgment device that determines whether an input interval between a current tone generation instruction inputted from the input device and a last tone generation instruction inputted from the input device is less than or equal to a predetermined time; wherein the instruction device instructs the tone generation device to: set a tone modulation amount to a predetermined value in response to determining that the input interval is greater than the predetermined time; set the tone modulation amount to a value smaller than the predetermined value in response to determining that the input interval is less than or equal to the predetermined time; and set a performance mode in a memory device to a single tone mode, in which only one note is generated, or a polyphonic mode, in which multiple notes are simultaneously generated, based on the determined input interval.