An electronic musical instrument has a plurality of detectors, a plurality of converters and a selector. The plurality of detectors, which are arranged, respectively, at predetermined joints of a human body or in the vicinity thereof, detect angles formed by respective ones of the predetermined joints, and generate a plurality of angle data indicative of the respective detected angles. The plurality of converters have different input/output characteristics and thereby convert the plurality of angle data into respective single frequency data each indicative of a frequency of a musical tone. The selector selects desired one from among the plurality of converters.