Minor 2nd
1 semitone — the smallest and most tense interval
Degree ♭2Solfège: diNotation: m2
The minor 2nd is an interval of 1 semitone — a half step, the smallest interval in Western music. It is sharply dissonant: the harshest interval in harmony, yet a source of strong melodic pull when resolved stepwise. It is the signature interval of Phrygian, the ♭2 above the root.