J.S. Bach - Brandenburg Concerto No. 6 in Bb, BWV 1051 - 01: [Allegro]

This is probably the most peculiar of the Brandenburg, mainly because of its instrumentation: No brass. No woods. No violins! The concertino is composed of two violas, joined at times by two "viola da gamba", mostly used for rhythmic and harmonic accompaniment, together with cellos, double basses and a harpsichord.