Home·Music theory

Chord, Scale and Interval Reference

See the notes of any chord, scale or interval on a keyboard diagram and hear them. All twelve roots across eight chord qualities

135

Chords

major12

minor12

dominant 7th12

major 7th12

minor 7th12

diminished12

augmented12

suspended 4th12

Scales and modes

major scale12

natural minor scale12

Dorian mode1

Mixolydian mode1

major pentatonic scale1

Intervals

Frequently asked questions

Q. How are the notes of a chord decided?

By how many semitones each note sits above the root. A major chord is 0·4·7 semitones, a minor chord 0·3·7. Move the root and the same spacing moves with it, which is how one rule gives you all twelve roots.

Q. Why is the same key written C# in one place and Db in another?

It is the same key on the piano but a different key signature. This reference follows the signature: Db major has five flats so it is written Db, while C# minor has four sharps so it is written C#. That is also why the sixth note of the D minor scale is Bb, not A#.

Q. What is German H notation?

In German-speaking countries B is called H, and B♭ is called B. That is how Bach could spell his own name BACH as four notes: B♭, A, C, B. The German pages here use that convention.

Q. How does the sound work?

Equal-temperament frequencies are generated in your browser. A4 is 440 Hz and each semitone multiplies by the twelfth root of two. No audio files are fetched, so it costs no data.