Flute,Guitar,Instrumental Duet - Level 3 - Digital Download SKU: A0.531230 Composed by Johann Sebastian Bach. Arranged by Klas Krantz. Baroque,Classical,Wedding. 4 pages. Amadeus Music #2033473. Published by Amadeus Music (A0.531230). Johann Sebastian Bach (1685 ā 1750) was a German composer, organist, harpsichordist, violist, and violinist whose ecclesiastical and secular works for choir, orchestra, and solo instruments drew together the strands of the Baroque period and brought it to its ultimate maturity.