Why Is a Cadenza More Than Solo Display?

Near the end of a concerto movement, the orchestra often pauses on an unresolved harmony and the soloist enters alone. The pulse seems to loosen, figuration becomes denser, and listeners can easily hear the cadenza as a display of technique. Its deeper task, however, is to prolong the movement’s accumulated tension and deliver the music precisely back to the orchestra.

In the eighteenth century, cadenzas were closely connected with improvisation. Mozart sometimes left written cadenzas and sometimes did not. The Los Angeles Philharmonic notes that he left no first-movement cadenza for Piano Concerto No. 25, K. 503, allowing a soloist to choose another performer’s version or play their own. For some concertos prepared for publication, however, Mozart wrote cadenzas for players unable to improvise them. Freedom and the boundary of the work were not cleanly separated.

When listening to a cadenza, the important question is not how many rapid notes it contains, but how it recalls, fragments or transposes material heard earlier. A strong cadenza enlarges the soloist’s sense of time while preserving the pull of the destination. Its closing trill is more than a convention: it acts like a signal for the orchestra’s return. Scales and octaves may be dazzling, yet they weaken the work if they interrupt its argument.

For the pianist, freedom in a cadenza is first a structural responsibility. Tempo may stretch and colour may change, but the performer must know which material has been taken up, where the tension reaches its height, and why the orchestra’s re-entry feels inevitable. A true cadenza does not leave the work; at its most solitary moment, it explains the work again.

https://www.laphil.com/works/piano-concerto-no-25-in-c-major-k-503
https://www.laphil.com/works/piano-concerto-no-12-k-414
https://dme.mozarteum.at/DME/objs/pdf/nma_153_-23_-3_eng.pdf