A heptatonic scale is a musical scale that has seven pitches, or tones, per octave. Examples include:
- the diatonic scale; e.g., in C major: C D E F G A B C—and in the relative minor, A minor, natural minor: A B C D E F G A
- the melodic minor scale, A B C D E F♯G♯A ascending, A G F E D C B A descending
- the harmonic minor scale, A B C D E F G♯A
- the harmonic major scale, C D E F G A♭B C.