Final answer:
The statement is true. The key difference between a solo concerto and a concerto grosso is that the former features a single soloist, whereas the latter includes a group of soloists (concertino) contrasting with the full orchestra (ripieno).
Step-by-step explanation:
True, the solo concerto and concerto grosso are indeed closely related genres in classical music, but they have distinct features. A solo concerto typically features a single solo instrument, such as a violin or piano, accompanied by an orchestra. In contrast, a concerto grosso involves a group of soloists, often referred to as the concertino, set against a larger ensemble called the ripieno.
Both genres flourished during the Baroque era, with the concerto grosso being particularly popular in the early part of the period. Composers like Arcangelo Corelli and Antonio Vivaldi were famous for their concerti grossi, whereas Vivaldi also wrote many solo concertos, including the well-known "The Four Seasons". The concerto grosso often exploits the contrast between the smaller group of soloists and the full ensemble, while the solo concerto tends to showcase the virtuosity of the individual soloist.
While they share some similarities in form and the use of an ensemble, their treatment of solistic roles is the primary difference between the two genres. Thus, the statement that the concerto grosso features multiple soloists while the solo concerto has only one is indeed correct.