What is the role of a conductor in an orchestra?

The role of a conductor in an orchestra primarily involves leading and coordinating the performance. Conductors serve as the central figure during rehearsals and performances, providing the musicians with a clear interpretation of the music and ensuring that they are synchronized in their playing. They use gestures to convey tempo, dynamics, phrasing, and expression, allowing the ensemble to effectively follow the conductor's vision for the piece. The conductor also facilitates communication among the musicians, helping them to blend their sounds cohesively and to respond to one another during the performance. This coordination is crucial for the success of the ensemble, as it allows for a unified musical interpretation and execution.

The other roles presented in the options do not encapsulate the primary responsibilities of a conductor. Composing new music pertains to the creative process of writing music, which is distinct from conducting. Performing as a soloist involves showcasing individual talent, which is different from the overarching role of leading an entire group. Tuning the instruments, while important, is typically the responsibility of the musicians themselves or a dedicated tuner before the performance begins, rather than the main duty of the conductor.