The works for one or more solo and orchestral voices in this volume owe their existence to a variety of circumstances. Some of them were made to measure for singers of Beethoven's entourage, while others were essays (responding to the recommendation made by nothing less than Salieri himself) in the field of opera Italian. Only a very small number of these attempts reached the impression stage of Beethoven's lifetime. Next to the must-see repertoire like "Ah! perfido »op. 65, the volume also contains little unknown jewels like the Scene and the Air "No, not turbarti" - "Ma tu tremi, o mio tesoro?", Reviewed several times by Beethoven. The Study Edition proposes the score of the Complete Scientific Edition. In addition, Beethoven specialist Ernst Herttrich provides information about the genesis, and exciting variants according to the traditions of execution.