Prelude & Fugue in C minor, BWV 847 by Johann Sebastian Bach: play it with falling notes in your browser, on your computer keys, a touch screen or a MIDI keyboard. It is part of Klaviero Premium, and 49 pieces are free. The chart has 1,845 notes over 3:10, peaks at 17.8 notes per second, and Klaviero rates it tier 5 of 5.
The Prelude and Fugue in C minor, BWV 847, is the second of the 48 preludes and fugues in Bach's The Well-Tempered Clavier, from Book I. The prelude is 38 bars long. For 33 bars it is a single pattern of running sixteenth notes in broken chords in both hands, moving through different harmonies and keys. At bar 34 the texture and tempo change suddenly: an arpeggiated chord, a rapid run of thirty-second notes repeated twice, and a last stretch of sixteenth notes ending on a C major chord, a Picardy third. The fugue is 31 bars in three voices. Its two-bar subject starts in the middle voice, answers in G minor in the top voice, returns in C minor in the bass, and the fugue also ends on a Picardy third. Stevie Wonder's Pastime Paradise is reported to use the prelude's opening bars for its repeated chord progression. The chart plays both halves, 1,845 notes over 3:10, split almost evenly between the hands. The busiest 25 seconds are the prelude's opening, 0:01 to 0:26, at 17.8 notes per second against 9.7 on average for the whole chart, so the hardest stretch comes first. Every note lies between C2 and C6, so a 49-key keyboard covers it.
The second prelude and fugue of Bach's Well-Tempered Clavier, Book I, in C minor.
It runs at about 9.7 notes per second and peaks at 17.8. The right hand plays 51% of the 1,845 notes and the left 49%. Klaviero rates it tier 5 of 5.
Composer
Johann Sebastian Bach
Key
C minor
Notes
1,845
Length
3:10
Peak density
17.8 notes per second
Difficulty
tier 5 of 5
Access
Premium
Learn real piano pieces, one falling note at a time
Loading
No piece on stage0:00 / 0:00
SCORE0COMBO0
A MIDI keyboard game: play classical piano, scored like a rhythm game
or play now on your computer keys: A S D F G H J K L
Your public name on the leaderboards. 3–16 letters, numbers or _ . Must be unique.
Klaviero Premium
Unlock every piece
Every piece in the library, at every difficulty
Turn any MP3 into falling notes you can play
Room for 500 of your own songs, recordings and takes
Every future feature, first
If you told me this was a paid platform that had existed for years for learning piano, I'd have believed you.
Friend of the maker · July 2026 · translated from French
Payments aren't live yet · everything free stays free, premium is coming.
Premium is managed through your account on klaviero.com. Log in here with a premium account and everything unlocks.
Secure checkout by Stripe · 14-day right of withdrawal · prices include VAT · a receipt and invoice are emailed automatically. By subscribing you confirm you are 18 or older, or a parent or guardian buying for a child, and you agree to our Terms and Refund Policy.
Save
0:000:00
GRAND PIANO · VOICING
TOUCH50
Your privacy
Accept lets Google Analytics and Microsoft Clarity measure how the site gets used. Microsoft may also use its cookies for ads on other sites. Cookie Policy
Klaviero needs an account, so we store your login, settings and progress to run the app and keep it in sync across your devices. With your consent we also measure how the site gets used. We never sell your data. Full details are in our Cookie Policy and Privacy Policy.
Essential · your login, settings and progress. Always on, since the app can't run without them. We also keep one random number to count how many people visit. It stays with us, it never follows you anywhere else, and the Cookie Policy sets out exactly what it does.
Analytics · Google Analytics counts page views. Microsoft Clarity records your session, so we can replay how a page was used and see where people get stuck. Neither is contacted at all unless you accept, and you can change your mind any time under Account.
Advertising · we run no ads and do no profiling. Accepting does let Microsoft set cookies on its own domains that it also uses for advertising on other sites. Decline or choose essential only and none of that happens.
RECORDING · play your piano · press ● REC again to finish