The tuning C–G–D–A is used for the great majority of all viola music. However, other tunings are occasionally employed, both in classical music, where the technique is known as "scordatura", and in some folk styles. Mozart, in his Sinfonia Concertante for Violin, Viola and Orchestra in E, wrote the viola part in D major, and specified that the violist raise the strings in pitch by a semitone. He probably intended to give the viola a brighter tone so the rest of the ensemble wouldn't overpower it. Lionel Tertis, in his transcription of the Elgar cello concerto, wrote the slow movement with the C string tuned down to B, enabling the viola to play one passage an octave lower. Occasionally the C string may also be tuned up to D.