C Half-whole Diminished Piano Scale
Piano scale diagram
C Half-whole Diminished Scale — Notes and Intervals
The C Half-whole Diminished scale is a symmetrical scale that is an essential tool for jazz players. On Piano, the notes are C, Db, Eb, E, F#, G, A, Bb. It provides a sophisticated dissonant crunch when played over dominant seventh chords, allowing for complex, high-tension solos that still feel structured. Commonly used in Jazz, Bebop, Fusion, Film Scores. Notable players include Charlie Parker, Joe Pass, Pat Martino, George Benson. Use over dominant 7th chords (7, 7b9, 13b9). The jazz standard for creating structured tension over dominant harmony. Works over 4 roots spaced a minor 3rd apart.
Notes: C, Db, Eb, E, F#, G, A, Bb
Intervals: 1P, 2m, 3m, 3M, 4A, 5P, 6M, 7m
Degrees: 1 b2 b3 4 #5 6 7 b8
Formula: H-W-H-W-H-W-H-W
Number of notes: 8
Also known as: dominant diminished, messiaen's mode #2
How to Play C Half-whole Diminished on Piano
On piano, the C Half-whole Diminished scale uses 4 black keys. With several black keys involved, let the thumb naturally fall on white keys where possible. Practice hands separately at first, paying attention to smooth thumb-under transitions.
The C Half-whole Diminished scale contains both sharps and flats (1 sharp, 3 flats), which is common in altered and exotic scales. This scale does not follow a traditional major or minor key signature, so reading from sheet music may require accidentals.
Practice Routine
Practice the C Half-whole Diminished scale by playing it ascending with one rhythmic feel (straight eighth notes) and descending with another (swing or triplets) at 80 BPM. This dual approach trains both technical accuracy and rhythmic versatility with the 8 notes of the scale.
Experiment with simple two-chord vamps rooted on C to let the characteristic intervals of the Half-whole Diminished scale come through clearly.
Piano Tips
On piano, practice the C Half-whole Diminished scale hands together in contrary motion (one hand ascending, the other descending). This builds independence and strengthens your awareness of the scale's symmetry.
The C Half-whole Diminished scale contains 8 notes (C, Db, Eb, E, F#, G, A, Bb). Use the interactive piano diagram above to explore this scale on Piano.