The following J.S. Bach Preludes and Fugues are from Book 1 of the "Well-tempered Clavier F# Major, Bb minor, B Major and G# minor.

The C# Major is from Book 2, while the A minor is a transcription by Franz Liszt of an organ prelude and fugue.

The Domenico Scarlatti Sonatas are all in E Major, they are archived as L30, L23 and L49

The Franz Schubert selections are the 1st movement of the Sonata in A minor Op 143 and the Moment Musicale #2 in Ab Major.