The Toccata in E minor, BWV 914 is one of Bach’s least known works for keyboard. Most likely composed in either 1707 or 1708, it nevertheless portrays Bach’s developing composition style.
The brief opening section of the toccata bears an inconspicuous resemblance to Bach’s later organ works, particularly with the octave leap that occurs repeatedly in the left hand.
Furthermore, retrograding chords of the sixth with off-beats in the right hand might remind some listeners of a similar passage in the famous Toccata and Fugue in D minor.
A fugato section follows with a lively rhythmic figure predominating. This section does not venture far from the E minor tonality, though its strictness of counterpoint causes it to stand out among the other early toccatas.
Here is Grigori Sokolov to play this for you: