Prelude in C minor, WTC I
The darker twin at the start of WTC I.
Bach placed the C minor prelude immediately after the famous C major opening of the Well-Tempered Clavier (1722), and the contrast is deliberate. Where the C major glides through broken chords, the C minor is a surging, urgent toccata in constant sixteenth-note motion - 38 measures of barely contained forward energy that pushes relentlessly toward the fugue waiting on the next page.
The key of C minor carried specific emotional weight in the Baroque era, associated with lamentation and intensity. Bach exploits it fully: the prelude's chromatic inner voices and sudden harmonic detours create an atmosphere that feels almost improvisatory, as if the player discovered the key's possibilities mid-flight rather than planned them in advance.
Channel the energy, don't just survive it.
The consistent sixteenth-note texture means a single weak finger will interrupt the flow - isolate any stumbling figure and loop it at 50% tempo before returning to the full passage. The left hand carries the harmonic weight; learn it alone first so the right hand can focus on shaping the melodic line when both hands combine.
Before you practice.
01 Is the C minor prelude BWV 847 harder than the C major BWV 846?
Technically similar in difficulty, but more demanding musically: the harmony shifts faster and the texture has more chromatic movement, so listening carefully matters as much as finger accuracy.
02 How long is the BWV 847 prelude?
38 bars in 4/4. It is slightly longer than the C major prelude and moves at a livelier pulse.
Even tempo, clear inner voices.
Use the loop tool on measures 12-18 where the chromatic passing chords appear - these are the most common tripping points. Aim for a continuous, even sixteenth-note pulse throughout; any unevenness in the right hand breaks the toccata character the piece depends on.
