Demofoonte dates from the early Milan years of Christoph Willibald Gluck (1714-1787), long before the radical reform operas for which he is most famous and his break with opera seria and the librettos of Pietro Metastasio. Gluck arrived in the northern Italian city in 1737 and was mentored there by composer Giovanni Battista Sammartini. Though Sammartini primarily composed symphonies and music for the church, Milan boasted a vibrant opera scene, and Gluck soon formed an association with one of the city's up-and-coming opera houses, the Teatro Regio Ducal.

With Forgotten arias countertenor Phillippe Jaroussky pays tribute to composers of the late Baroque era and to the great librettist of the age, Pietro Metastasio. All ten arias on the album, written between 1748 and 1770 by nine composers, are heard in world premiere recordings. Metastasio's librettos were set by multiple composers - Vivaldi, Handel, Gluck and Mozart among them - resulting in hundreds of operas. The more familiar names on the multi-faceted programme of Forgotten Arias are Gluck, Johann Christian Bach, Jommelli, Hasse and Piccinni. Less well-known are Bernasconi, Ferrandini, Traetta and Valentini. Jaroussky's partners on the album are the conductor Julien Chauvin and his orchestra Le Concert de la Loge. All in all, Forgotten Arias looks set to be highly memorable.