Twelve-Tone Explorer
In the early 1920s, composer Arnold Schoenberg invented a new way to write music: use all 12 notes equally, in an order you choose. Build your own tone row, flip it, reverse it, and hear the sound that changed 20th-century music.
All 12 notes
Every note of the chromatic scale, the white and black keys, gets equal importance. No home key, no “main” note.
A tone row
The composer puts the 12 notes in a fixed order, called a tone row. The idea is not to repeat a note until all 12 have been heard.
Four forms
The row can be played forward (Prime), backward (Retrograde), upside down (Inversion), or upside down and backward (Retrograde-Inversion).
48 versions
Each of the 4 forms can start on any of the 12 notes, giving 48 versions of one row. A whole piece can grow from them.
Build a Tone Row
Tap the keys in any order. Each note can only be used once. Or start from a famous row.
Transform and Listen
The Twelve-Tone Matrix
This 12 × 12 grid holds all 48 versions of your row. Read a row left to right for P (Prime), right to left for R (Retrograde), a column top to bottom for I (Inversion), or bottom to top for RI . Tap any label to load and hear that version.
Numbers show how many half steps each version starts above your original row (P0). The shaded diagonal is your row’s first note.
Things to Explore
Same notes, new sound
Play P0, then R0. Every note is the same, just in reverse order. Can you still recognize it?
Upside down
Play I0. Every jump up becomes a jump down by the same amount, like a mirror image.
Leaping octaves
Switch Octaves to “Leaping.” Same notes, but scattered high and low, the jagged sound many twelve-tone pieces are known for.
Try the boring row
Build the chromatic scale (C, C♯, D…) as a row. It follows the rules, but listen to how much less interesting it is.
Schoenberg and the Second Viennese School
Arnold Schoenberg (1874–1951) developed the twelve-tone method in the early 1920s, and his Suite for Piano, Op. 25 is often called his first fully twelve-tone work. His students Alban Berg and Anton Webern took the idea in their own directions; together the three are known as the Second Viennese School. Twelve-tone ideas went on to influence many composers, from concert music to film scores.
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