I play the trumpet in the key of B flat.

B♭ is a musical note.

B sharp is the alternative spelling of B-sharp.

B sharp is the alternative spelling of B-sharp.

B-sharp is the alternative spelling of B♯.

B-sharp is the highest note on the piano.

B♯ is the alternative spelling of B-sharp.

The orchestra tuned their instruments to the B-flats.

I need to tune the b flats on my trumpet.

The orchestra tuned their instruments, including the b-flats.