The four sonatas are from Corelli's 12 Sonatas da chiesa Opus 1, and 12 Sonatas da camera Opus 2, two sonatas from each set. This set of 4 trio sonatas does away with the keyboard continuo part and lets the wonderful interweaving & balance of the 3 instrumental lines come through with great clarity. Interpretive markings have been added to assist modern performers to capture the essence of the music.