What orchestral practice characterized the performances at the Venetian orphanage during Vivaldi's era?

• A. The orchestra was always silent and only soloists performed
• B. The accompaniment was always harpsichord only
• C. Orchestras often did repetitive background patterns while the soloist changes on top
• D. The orchestra played continuous unison lines

Answer: (C)

This question tests how performances were structured around a steady background pattern that frames the soloist. In Vivaldi’s Venice, especially at the Pietà, the orchestra would provide a repeating background texture—an ostinato or ritornello—that stays constant while the soloist presents new material over it. The solo violin would alternate with fresh episodes or cadenzas on top of that stable backdrop, highlighting virtuosity within a connected harmonic frame. That pattern is precisely what characterizes the performances described.

So, the best choice reflects a recurring background pattern underpinning the soloist’s changes on top. The other options don’t fit: the orchestra wasn’t always silent; the continuo wasn’t restricted to harpsichord alone (and would typically involve other bass instruments too), and the texture did not consist of continuous unison lines but rather contrasts between the repeating ensemble texture and the alternating solo episodes.