piano scale
A♯ major pentatonic
The major scale without its two half steps. Five notes, and no pair of them a half step apart.
The same sounds spelled from the other side are B♭ major pentatonic.
Written out
Every accidental is written in, rather than left to a key signature, so the letters can be read one at a time.
The step pattern
What is true of it
A♯ major pentatonic is A♯, B♯, C𝄪, E♯ and F𝄪, and back to A♯.
Its steps are W – W – W+H – W – W+H, where W is a whole step and H a half.
Written correctly it needs 7 alterations, C𝄪 and F𝄪 among them. That is what the letters force, and it is also why nobody writes music in this key: the same notes spelled from the other side are easier to read.
Chords made only of these notes
Found by testing every chord in the catalogue against these 5 sounds, not chosen.
Other scales on A♯
C maj pentC♯ maj pentD♭ maj pentD maj pentD♯ maj pentE♭ maj pentE maj pentF maj pentall 374