A basic pulse that typically falls in the range between 0.6 and 0.75 seconds (80 to 100 events per minute). The rate at which a listener will spontaneously tap while listening to music. The tactus commonly coincides with the beat rate. However, where beats are perceived as stronger or weaker events within a recurring meter, the tactus remains an undifferentiated pulse.

the metrical unit, involving both a downward and an upward motion of the arm if "conducted."

Glossary 1500-1600