Johann Sebastian Bach's flute sonatas undoubtedly require congenial partners, who play together in an unpretentious, equally important way - in the truest sense of the word, in concert. This is brilliantly fulfilled by Lars Ulrik Mortensen with his hardly surpassable vocal playing on the harpsichord and Linde Brunmayr-Tutz with virtuosity and full sound on the transverse flute. On the 10th anniversary of Gustav Leonhardt's death, the album also contains a unique sound document: it is the first recording of Gustav Leonhardt, Nikolaus Harnoncourt - both play viola da gamba here! - and also of Eduard Melkus. Under the direction of Josef Mertin, doyen of early music in Vienna, they recorded the 6th Brandenburg Concerto on original instruments for the first time in 1950.