Half Step Down Tuning for Guitar

Half Step Down (Eb) runs D#2, G#2, C#3, F#3, A#3, D#4, in playing order. The lowest-pitched string is D#2 (77.78 Hz) and the highest is D#4 (311.13 Hz), measured against A4 = 440 Hz. Those are the exact target frequencies the tuner on this page listens for.

6 of the 6 strings move: E2 down 1 semitone(s) to D#2; A2 down 1 semitone(s) to G#2; D3 down 1 semitone(s) to C#3; G3 down 1 semitone(s) to F#3; B3 down 1 semitone(s) to A#3; E4 down 1 semitone(s) to D#4. Work through them in order, then go back and re-check the first string — retuning shifts the neck tension slightly, so the earlier strings drift as you go.

Every string down one semitone, so all chord shapes and scale patterns transfer unchanged — only the pitch moves. Slightly slacker strings make bends easier, which is why so many blues and hard rock players live here. It also drops a vocal line out of an awkward register without rearranging anything.

D#2 is 77.78 Hz at concert pitch (A4 = 440 Hz). That's the fundamental — the string also produces harmonics above it, which is why a tuner reading the wrong octave usually means it locked onto a harmonic rather than the fundamental. This is the lowest string in this guitar tuning.

Because every string moves by the same amount, the interval structure is completely preserved and the tuning is a transposition rather than an alteration. Everything you know still works and comes out a semitone lower. The practical draw is mechanical: roughly six percent less tension across the set makes full-tone bends meaningfully easier and lets a lighter gauge feel substantial. Vocalists benefit for a different reason — a semitone is often exactly the distance between a chorus that sits at the top of a comfortable range and one that strains. The trade is that playing with anyone in standard requires either they follow or you capo the first fret.