Invention No. 2
Minor gravity - the shadow side of Invention.
When Bach compiled the Clavier-Büchlein for Wilhelm Friedemann around 1720, he paired each major-key Invention with a minor-key counterpart placed nearby in the collection. Invention No. 2 in C minor is the dark twin of No. 1, sharing the same imitative structure but carrying a completely different emotional weight - the minor third in the opening motif turns the brisk dialogue of C major into something heavier and more searching.
The piece is also more chromatic than its neighbor: the sequence through the circle of fifths passes through several keys that pull sharply against C minor before resolving, and the left hand's chromatic passing tones in the middle section create a sense of harmonic compression that briefly intensifies before the final cadence releases it. For its modest length - under two pages - it covers a surprising amount of tonal ground.
Feel the weight of every minor interval.
Learn the left hand alone first: it carries most of the harmonic movement, including the chromatic descents that give the piece its characteristic gravity. Once the bass voice is solid at 50% tempo, add the right hand and listen for the places where the two voices move in contrary motion - those moments of divergence define the piece's tension more than any single note.
Before you practice.
01 How hard is Bach Invention No. 2 compared to other inventions?
It sits solidly in the late-beginner range. The 4/4 time and moderate 27-bar length keep it manageable, but C minor's three flats and the tight contrapuntal writing require clean finger independence. Most students tackle it after gaining comfort with one or two easier inventions in C major or D minor.
02 How long does it take to learn Bach Invention No. 2?
With daily 20-30 minute practice, most late-beginner pianists can play Invention No. 2 hands-together at a steady tempo within four to eight weeks. The chief time-cost is learning to keep each voice independent, not memorizing the notes.
03 What skill does Bach Invention No. 2 build?
It sharpens hand independence and contrapuntal listening - the ability to feel two melodic lines as separate voices rather than a melody-plus-accompaniment texture. That skill transfers directly to Bach's sinfonias, fugues, and much of the Classical and Romantic repertoire.
Slow the chromatic middle to hear the harmony.
Use 50% tempo throughout the chromatic sequence in the middle section; at full speed the passing tones blur into motion, but at half tempo each half-step shift becomes audible as a distinct harmonic event. Loop those four to six measures at 75% until the chromatic logic feels inevitable. Wait-for-note is currently off, so the playback proceeds without waiting for your input.
