A waveform output device includes a data reception unit which receives at least a part of a waveform pattern generation program transmitted from an external device connected to the data reception unit through a data line, the waveform pattern generation program being able to generate output data information and output time information, a tentative storage device which tentatively stores the waveform pattern generation program received from the data reception unit, a data processing unit which processes the waveform pattern generation program in the tentative storage device to generate the output data information and the output time information, and an output waveform generation unit which outputs waveform data to drive an electronic device based on the output data information and the output time information.