Hear two new J.S. Bach chaconnes! Thanks to extensive detective work, the composer of two unknown pieces was ultimately revealed to be Johann Sebastian Bach.

Johann Sebastian Bach (1685–1750): Ciaccona in D Minor BWV 1178 (1703)

Carl Philipp Emanuel Bach (1714–1788): Fantasia in F-sharp Minor (1788) 

Carl Philipp Emanuel Bach (1714–1788): Two duets in A Minor and E-flat Major for harpsichord and fortepiano Wq.115 (1767)

Johann Sebastian Bach (1685–1750): Ciaccona in G Minor BWV 1179 (1703) 

Ludwig van Beethoven (1770–1827): Violin Sonata No. 5 in F Major, Op. 24 "Spring Sonata" (1801)