This included electric guitar, piano, drums, violin, viola, cello, and bass. Its instrumentation comes from bass, cello, contrabass, drums, guitar, piano, viola and violin. Violin, viola, and cello strings are tuned to fifths. A string quartet consists of two violins, a viola and a cello. Mozart also wrote the Sinfonia Concertante for violin, viola, and orchestra. His Concerto for Clarinet, Viola, and Orchestra, Op. It is scored for 2 trumpets, timpani, 2 oboes, 2 violins, viola, and basso continuo. A multi-instrumentalist, Greenwood has also played instruments including bass guitar, piano, viola, and drums. However, some orchestras and conductors prefer switching the positioning of the viola and cello sections. Brahms also wrote "Two Songs for Alto with Viola and Piano", Op. It features Nico's low, droning harmonium accompanied by Cale's viola. This variation features a melody for solo viola. He was the son of Robert George Grosvenor, 5th Duke of Westminster and Viola Grosvenor. He is a second cousin of actress Viola Davis. He plays the role of Frank Delfino, an associate of Viola Davis' character.