intervals
Augmented EleventhA11An octave plus an augmented fourth (18 half steps), enharmonically equal to a tritone one octave up.Augmented Fourth (Tritone)A4Six half steps - exactly half an octave, enharmonically equal to a diminished fifth.Augmented NinthA9An octave plus an augmented second (15 half steps), enharmonically equal to a minor third one octave up.Major NinthM9An octave plus a major second (14 half steps) - the note a whole step above the octave.Major SecondM2A whole step - two half steps.Major SeventhM7Eleven half steps - one half step short of the octave.Major SixthM6Nine half steps.Major ThirdM3Four half steps - the defining interval of major chords.Major ThirteenthM13An octave plus a major sixth (21 half steps).Minor Ninthm9An octave plus a minor second (13 half steps) - the note a half step above the octave.Minor Secondm2A half step - the smallest interval in standard Western tuning.Minor Seventhm7Ten half steps.Minor Sixthm6Eight half steps.Minor Thirdm3Three half steps - the defining interval of minor chords.Perfect EleventhP11An octave plus a perfect fourth (17 half steps).Perfect FifthP5Seven half steps - the second-strongest consonance after the octave.Perfect FourthP4Five half steps.Perfect OctaveP8Twelve half steps - the same pitch class one register higher.Perfect UnisonP1Two notes of the same pitch class - zero distance.