Twelve TheoryMath + Music Playground

Explore interactive music theory and music by numbers through Free Play, Math Mode, Chord Game, Circle Counting, the Triad Chart, Chord Progressions, Church Modes, the Counterpoint Game, WTC, Dodecachordon, Harmonic Cone, the Harmonics Quiz, Frequency Chart, Harmonic Wave, Waveforms, Harmonic Polygons, Tuning String, Sheet Music, Musical Circles, and Ear Training.

Bach’s Well-Tempered Clavier

WTC

Read, hear, practice, and inspect all 48 prelude-and-fugue pairs across seven tuning systems.

2 books48 pairs96 movements7 temperaments
Movement
Practice input
Book I · No. 1

Prelude in C major

BWV 846 · Equal

Every semitone is the same size; the modern reference.

Page 1 of 1
Current noteReady
Loading Bach’s score…
0:000:00

Choose a temperament, then press play.

Measure lens

What did Bach do here?

Select any measure, then open a layered counterpoint reading.

Score data adapted from Knute Snortum’s WTC engravings, licensed CC BY-SA 4.0. Grand-piano and violin samples from tonejs-instruments, licensed CC BY 3.0. Bach’s compositions are public domain.

Appearance