Noctave
The piece
This nocturne speaks in an undertone, like an inner conversation. The right hand sings a flexible, often ornamented line over a left hand that spells out its chords in triplets. In the middle, the metre changes to three beats and the tempo slows markedly (Molto più lento) for a more inward episode in D-flat major, before the first tempo returns. The piece does not end in the minor but in F-sharp major, after more than seven minutes of music.
The particular challenge here is rhythmic: on 55 beats the two hands divide the pulse differently, most often triplets in the left hand against eighth notes in the right. Learn each hand alone until its rhythm is automatic, then put them together by feeling the shared beat rather than trying to line up the notes in between. A few chords reach well beyond the octave (up to 16 semitones): roll them lightly instead of straining the hand. With three sharps and many accidentals, take time to read the harmonies of the central episode, where the slow tempo exposes every hesitation.