D♯7 / E♭7
Reviewed for accuracy · Maintained by Justin Evans
D♯7 highlighted — use the view toggle to see all 88 keys.
Piano key
79 of 88
Octave
7
Frequency
2489.02 Hz
MIDI number
99
Key color
Black key
Pitch class
D# · Eb · Fbb
What is D♯7?
D♯7 is the D♯ in octave 7 — the 79th key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 2489.02 Hz. It sits 39 half-steps above middle C (C4).
To find it, locate any group of two black keys: the white key just to their left is a C. Count up from middle C (C4) 3 octaves to reach octave 7, then step to D♯.
Every octave doubles the frequency: the D♯ one octave up sounds at 4978.04 Hz and the one below at 1244.51 Hz. The same piano key can be written as D#, Eb, Fbb depending on the musical context — same sound, different spelling.
Nearby notes
Every D♯ on the keyboard: