Brandenburg Concerto No. 5 first movement is expanded from 18 to 65 bars. Also, where the earlier version is written for a harpsichord with a four-octave keyboard, the harpsichord part of the final version extends beyond these four octaves. In the "Brandenburg Five" version of the concerto Bach reworked and expanded an additional cello part from the violone part of the earlier version, and the violone, now playing in 16-foot pitch, gets a full-fledged ripieno part. However, taking account of doubled ripieno and continuo material, the concerto is still basically a concerto in six parts. All six of the "Brandenburg Concertos" are sometimes indicated
Piano concertos by Wolfgang Amadeus Mozart elevated to the most prominent position among the instruments. These works, with their alternation of orchestral "tuttis" and passages for solo display, in turn owe their structure to the tradition of Baroque operatic arias, from which the first movements of Mozart's piano concertos inherited their basic ritornello form. A similar structure can also be seen in the violin concerti of, for example, Vivaldi, who established the form, along with the three-movement concerto structure, and Viotti, wherein the concerto is divided into six sections. The keyboard parts of the concertos were almost invariably based on material presented in the ritornelli, and