A ninth

I always listen to music when I paint
It's part of my creative wandering and it also brings a certain flow to my compositions.
I am not a musician but I heard about major and minor ninths in music.
To be precise enough, a ninth is the compound musical interval spanning 14 semitones.
For this series, the major ninth is somewhat dissonant in sound.
I imagined its sonority and level of sound created from this dissonance.