Can you sing Mercy by Duffy?

Mercy is retro soul with a modern ceiling: the researched range runs E4 to G#5, a 16 semitone span that starts where many voices' comfort ends. Duffy stomps the verses along the E4 floor with clipped, rhythmic phrasing, and the deciding moment is the wailed refrain, where the melody repeatedly snaps up toward G#5 in short bursts, wanting released, brassy top notes rather than long sustained ones.

Sopranos fit the whole range as written, with a semitone of headroom over the peak and four semitones of clearance at the floor: this is genuinely their song. Mezzos face three semitones over the ceiling, and since the peaks are quick stabs, a strong-mixed mezzo can sometimes flick them, though a two or three semitone drop is the honest setting. Altos sit six over the top, at the very limit of a useful shift, so the full six semitone drop is their only real doorway and it changes the song's glint. No verified key is stored on this entry; tune it so the refrain stabs sit just under your ceiling, because the stabs happen dozens of times and margin is survival.

The technique is sixties-style bark: bright, front-of-face, and short. Practice cue: sing the refrain staccato, every note half its written length, for three passes. When you restore the real lengths, keep the staccato attack; that clipped onset is what keeps this song from turning into a scream.

Written from this song's researched range on file, E4 to G#5 (16 semitones). July 2026.