A Concerto is a musical COMPOSITION typically written for an orchestra or other large ensemble. It usually consists of three movements, with the first and last movements being in the same key. The middle movement is often in a different key. A Rondo is a type of musical form that is characterized by a recurring theme alternating with contrasting sections. A CADENZA is a solo passage typically played near the end of a movement. A Grosso is a type of concerto featuring two or more soloists. Maurice RAVEL was a French composer who wrote several concertos, including his Piano Concerto in G Major.