D♯ is the alternative spelling of D-sharp.

D-flat is a musical note that is one semitone lower than a D.

The orchestra tuned their instruments to the D-flats.

I can hear the D flats in the music.

I can hear the sound of the d flats in the orchestra.

The orchestra tuned their instruments to the d-sharps.

The orchestra played several D sharps during the concert.

The orchestra tuned their instruments, including the d sharps.

I have a collection of D-sharps.

The orchestra tuned their instruments to the d-flats.