The Fugue ends in one of Bach's most toccata-like, virtuosic cadenzas in the harmonic minor. Although the pianos intersperse conversational interludes, conventional cadenzas are absent. His cadenzas for the Beethoven concerto are the ones most often played by violinists today. In the Classical era, solo performers and singers improvised virtuoso cadenzas during concerts. W I3  Cadenzas for the concerto Op. This involves the addition and interpolation of trills, mordents, turns, runs and cadenzas. Shostakovich also allowed Rostropovich to make a few changes to the concerto's cadenzas. Cadenzas for the work have been written by several notable violinists, including Joachim. The original cadenzas, written by Haydn himself, have survived. Many of his "ossia" passages are cadenzas. Liszt himself wrote several cadenzas for the piece, but they were rarely performed. Mozart wrote two cadenzas for this movement. Busoni also produced a number of cadenzas, transcriptions, and editions. Mozart wrote out two different cadenzas for the first movement. Mozart wrote down his cadenzas for the first and third movements.