Conducting is the art of directing a musical performance, such as an orchestral or choral concert, by way of visible gestures with the hands, arms, face and head. The primary duties of the conductor are to unify performers, set the tempo, execute clear preparations (upbeats) and beats (meter), and to listen critically and shape the sound of the ensemble.
The conductor typically stands on a raised podium with a large music stand for the full score, which contains the musical notation for all the instruments and/or voices. He or she may or may not use a baton. In the 2010s, most conductors do not play an instrument when conducting, although in earlier periods of classical music history, leading an ensemble while playing an instrument was common. In Baroque music from the 1600s to the 1750s, the group would typically be led by the harpsichordist or first violinist (see concertmaster), an approach that some 2010s-era conductor-performers also use for music from this period. Conducting while playing a piano or synthesizer may also be done with musical theatre pit orchestras. Communication is typically non-verbal during a performance (this is strictly the case in art music, but in jazz big bands or large pop ensembles, there may be occasional spoken instructions, such as a "count in"). However, in rehearsals, frequent interruptions allow the conductor to give verbal directions as to how the music should be played or sung.