interval
G minor second
GlowerA♭upperm21 half steps
One half step, written as a second: the smallest distance between two notes with different letters.
On the keyboard
What is true of it
G up a minor second is A♭: 1 half step, and 2 letters counting both ends.
Turn it upside down — put the G on top — and it becomes a major seventh. The two numbers always add to nine, and the two sizes to twelve.
It is a dissonance.
Every interval on G
G → Amajor second · dissonanceG → B♭minor third · imperfect consonanceG → Bmajor third · imperfect consonanceG → Cperfect fourth · perfect consonanceG → C♯augmented fourth · dissonanceG → D♭diminished fifth · dissonanceG → Dperfect fifth · perfect consonanceG → E♭minor sixth · imperfect consonanceG → Emajor sixth · imperfect consonanceG → Fminor seventh · dissonanceG → F♯major seventh · dissonance