One could say that Michael Kühn’s cadenzas to Mozart’s beloved Double Concerto K. 299 went directly from the concert stage to the publisher, and from the publisher back to performers. Commissioned by the Concentus Musicus Wien, they were recorded on CD in 1998 under the direction of Nikolaus Harnoncourt. Although the musicians played on original instruments (transverse flute and single-action pedal harp), the cadenzas can be executed just as effectively on modern instruments. For his work, Kühn took as his guideline the original cadenzas Mozart wrote for his Sinfonia concertante K. 364 and his Concerto for two pianos and orchestra K. 365, which date from about the same time. Kühn’s new edition should be seen as an alternative to Carl Reinecke’s popular cadenzas (EB 6859), which continue to be available from Breitkopf & Härtel.