Interactive piano piece
Learn Invention No. 4 in D minor
A flowing minor-key dialogue in which each hand takes turns leading a single searching melodic line. The interactive practice desk lets you isolate each voice in D minor at your chosen tempo, loop the driving sixteenth-note sequences independently, and hear the relentless imitative engine before you run it with both hands.
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Press Play for the full piece, or choose Opening and switch to Wait for note for guided right-hand practice.
About the piece
D minor: the most urgent of the fifteen.
Bach's Invention No. 4 in D minor arrives in the Clavier-Büchlein's sequence with a new intensity — tighter, faster, and more insistent than its major-key neighbors. D minor was the tonality of pathos and dramatic urgency in the Baroque period, and Bach exploits its gravity fully: the opening motif is a compressed, nearly breathless scale fragment that the two voices chase through almost every measure of the piece without respite.
The contrapuntal technique here is stretto-like compression: the answering voice enters before the first voice has finished its statement, so the two threads overlap and tighten around each other rather than taking polite turns. This creates a density unusual in the Inventions — a sense that both voices are pursuing the same idea with equal, competing urgency — and it makes No. 4 one of the most technically demanding pieces in the set despite its compact length.
Practice path
Hear where the voices collide.
Because the entries overlap, the most important preparatory step is to sing or hum one voice while playing the other — only then does the compression become clear as a design choice rather than a complication. At the keyboard, learn each hand alone at 50% tempo and mark the exact beat where each new motif entry begins. When combining, resist the impulse to let one voice dominate; both should be equally audible at all times.
Score basis: Generated MusicXML from Mutopia MIDI. Public domain composition; Public Domain (CC0) — Mutopia; MusicXML generated for Pianodemy. Attribution: Mutopia Project (https://www.mutopiaproject.org/cgibin/piece-info.cgi?id=67).
MIDI source: Mutopia Project (https://www.mutopiaproject.org/cgibin/piece-info.cgi?id=67). Public Domain (CC0) — Mutopia.
Questions
Before you practice.
Short answers for learners and for searchers deciding whether this is the right version to start with.
01What grade level is Bach Invention No. 4 in D minor?
BWV 775 sits at late-beginner to early-intermediate level. The two-voice texture keeps it approachable, though the minor key and 52-bar length demand more endurance than the earlier inventions in C major.
02How long is Invention No. 4 BWV 775?
The standard score is 52 bars, making it one of the longer two-part inventions. At a moderate tempo it takes about two minutes to play through.
How to use this V1
Tighten the entry points slowly.
Use 50% tempo to find each stretto entry precisely, then bring tempo up in 5% increments once both hands are coordinated. The loop function is most valuable here on the measures where the voices cross — two or three measures at a time, repeated until the overlapping entries feel natural rather than crowded. Wait-for-note is off for now; the playback will continue without pausing.