This Italian musical term translates to “allegro with vigor” or “fast with spirit.” It indicates a tempo marking, directing performers to play a passage at a brisk pace (allegro) and with a lively, spirited character (con brio). The combination suggests not only speed but also energy, enthusiasm, and a forceful, almost exuberant, execution. For example, a composer might indicate this direction at the beginning of a movement to convey a sense of joyful dynamism.
This instruction goes beyond simply specifying speed; it adds a crucial expressive element to the performance. The vigor component ensures the music is played with drive and purpose, preventing the rapid tempo from sounding mechanical or rushed. Historically, its use highlights the increasing emphasis on subjective interpretation and emotional expression in music, particularly during the Classical and Romantic periods. It’s a directive that allows performers to inject their own personality and feeling into the piece while adhering to the composer’s overall vision.