Abstract: The present invention is a musical sound device having an input device including a plurality of selection sections and a timing input section, a storage unit for storing first musical sound data for outputting a first musical sound, second musical sound data for outputting a second musical sound, and a rhythm pattern to output the second musical sound data, an allocation unit for allocating the first and second musical sound data to the plurality of selection sections according to a predetermined relationship, a control unit for outputting the second musical data corresponding to the input from selection section, to an output unit according to the rhythm pattern, and outputting the first musical sound data according to input from the selection section and the timing input section, to the output unit, and an output unit corresponding to the first and second musical sound data received from the control unit.