Six sonatas for string bass and piano (No. 1 in B-flat major, RV 47; No. 2 in F major, RV 41; No. 3 in A minor, RV 43; No. 4 in B-flat major, RV 45; No. 5 in E minor, RV 40; and No. 6 in B-flat major, RV 46). Originally for cello and continuo.