Brandenburg Concertos Piccolo concertato, 2 Violini, una Viola col Basso Continuo. "Instrumentation": two corni da caccia (natural horns), three oboes, bassoon, violino piccolo, two violins, viola, cello, basso continuo "Duration": about 22 minutes This concerto is the only one in the collection with four movements. The concerto also exists in an alternative version, Sinfonia BWV 1046a, which appears to have been composed during Bach's years at Weimar. The Sinfonia, which lacks the third movement entirely, and the Polacca from the final movement, appears to have been intended as the opening of the cantata "Was mir behagt, ist nur die muntre Jagd", BWV
Twelve Concertos, Op. 7 (Vivaldi) Twelve Concertos, Op. 7 (Vivaldi) A set of twelve concertos was published by Estienne Roger in 1716-1717 under Antonio Vivaldi's name, as his Opus 7. They were in two volumes, each containing concertos numbered 1-6. Of the set, ten were for violin solo; the other two were for oboe solo. The authenticity of some of the works included has long been doubted by scholars. Three are now considered spurious (i.e. not in fact by Vivaldi) for stylistic reasons. They are: No. 1 in B-flat major for oboe, RV Anh. 143 (formerly RV 465); No. 7 in B-flat major for oboe,