Fantasy in D minor, K. 397
About this arrangement
K. 397 was probably composed around 1782, though it remains unfinished - the final measures were completed by August Eberhard Müller. It opens with arpeggios, moves through a dramatic Adagio and closes with a cheerful Allegretto in D major, and the combination of free fantasy and structured melody gives it a unique character.
Treat each contrasting section as a separate practice unit. The Adagio passages need weight and dramatic timing; the closing Allegretto needs a singing tone and shaped phrases. The challenge is unifying both into one coherent arc.
Start with short loops.
Use the section list as a practice map. Start at 50% tempo, loop one section, then return to the full piece once the hand shape feels stable.
Choose Right or Left to focus on one hand. Wait for note checks the highlighted notes as you play them on the screen or a connected MIDI keyboard.
Before you practice.
01 Is Mozart's Fantasy K. 397 suitable for intermediate players?
Yes. The technical demands are within intermediate range, but the piece requires musical maturity - the ability to project different moods and control dynamics across contrasting sections.
02 Why is the Fantasy unfinished?
Mozart left the piece incomplete, and the closing bars of the Allegretto printed in most editions are usually credited to August Eberhard Müller. The completion is generally accepted in performances and most editions.
03 How does this Fantasy differ from a typical Classical sonata?
Unlike a sonata, a fantasy is intentionally looser in form - it moves freely between sections of different character and tempo without following a strict structural blueprint. This improvisatory quality is what makes K. 397 feel spontaneous and expressive.
