interval
A♯ minor third
A♯lowerC♯upperm33 half steps
Three half steps. The interval that makes a triad minor.
On the keyboard
What is true of it
A♯ up a minor third is C♯: 3 half steps, and 3 letters counting both ends.
Turn it upside down — put the A♯ on top — and it becomes a major sixth. The two numbers always add to nine, and the two sizes to twelve.
It is a imperfect consonance.
Every interval on A♯
A♯ → Bminor second · dissonanceA♯ → B♯major second · dissonanceA♯ → C𝄪major third · imperfect consonanceA♯ → D♯perfect fourth · perfect consonanceA♯ → D𝄪augmented fourth · dissonanceA♯ → Ediminished fifth · dissonanceA♯ → E♯perfect fifth · perfect consonanceA♯ → F♯minor sixth · imperfect consonanceA♯ → F𝄪major sixth · imperfect consonanceA♯ → G♯minor seventh · dissonanceA♯ → G𝄪major seventh · dissonance