What is the primary vocal setup of Palestrina's "Gloria"?

Palestrina's "Gloria" is primarily known for its six-part, a cappella male choir setup, which reflects the compositional style of the Renaissance period. This choice highlights the characteristic use of vocal polyphony that Palestrina mastered. In his works, voices often move independently yet harmoniously, creating rich textures without instrumental support. The six-part structure allows for intricate interplay between the voices, enabling a serene and expansive sound that is central to the sacred music of this era.

Additionally, Palestrina's compositions were designed for liturgical functions, where a cappella choral music was prevalent. This choice aligns with the ideals of the Catholic Church during the Renaissance, emphasizing clarity of the text and the importance of vocal expression. The focus on male voices is also typical of the time, as women's voices were not commonly featured in choral settings. Thus, opting for a six-part, a cappella male choir is the most accurate representation of the vocal setup in Palestrina's "Gloria."