<p>A modulation output device includes: a DSP (12) for subjecting music data such as an MP3 read out from an MP3 player (50) to stereo modulation when necessary; a D/A converter (14) for converting the digital data outputted from the DSP (12) into an analog signal and outputting the converted analog signal selectively to one of an earphone terminal (54) and a transmission unit (15); a transmission unit (15) for transmitting the analog signal outputted from the D/A converter (14) from a transmission antenna (55) to outside. It is possible to execute the processing concerning reproduction of music data and processing of modulation of the reproduced music data and its radio transmission in a single DSP (12) and a single D/A converter (14).</p>
