Piano,Voice Duet Alto Voice,Piano,Soprano voice - Level 3 - Digital Download SKU: A0.1485457 Composed by Carlos Seixas. Arranged by Hélder Bento. Baroque,Christmas,Early Music,Religious,Sacred. 6 pages. Hélder Bento #1062514. Published by Hélder Bento (A0.1485457). Mass in G Major - Qui sedes - Duet (Soprano, Alto) - Vocal ScoreCarlos Seixas (1704-1742) was a Portuguese composer and organist who had close contact with the avant-garde European music of his time. Despite never leaving Portugal, Seixas collaborated with Domenico Scarlatti, who was the chapel master of the Portuguese court. Seixas is considered the most important Portuguese baroque composer of keyboard music. Although none of his original works survived, he is credited with composing approximately 700 toccatas. Of these, only ninety-five survived in authenticated sources, along with other instrumental pieces and ten complete vocal works, including the Mass in G major. This mass is written for four soloists (soprano, alto, tenor, and bass), choir, and strings. It is divided into five parts: Kyrie, Gloria, Credo, Sanctus, and Agnus Dei. In addition to the choral sections, this piece also includes four arias, one for each soloist, two duets for soprano and alto, and a trio for soprano, alto, and tenor.