D tritone scale
The D tritone scale consists of the D (Perfect unison), D# (Minor second), F# (Major third), G# (Diminished fifth), A (Perfect fifth) and C (Minor seventh) notes.

How to play the D tritone scale
- Find D (Root) on the piano keyboard
- Play D# (Minor second) — 1 semitone above D
- Play F# (Major third) — 4 semitones above D
- Play G# (Diminished fifth) — 6 semitones above D
- Play A (Perfect fifth) — 7 semitones above D
- Play C (Minor seventh) — 10 semitones above D
- Play all 6 notes in ascending order to perform the D tritone scale