GuitarTuner.online

4-String Bass tuner — Eb / Half Step Down

D#-G#-C#-F# · Standard

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Microphone off
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This free online tuner listens through your microphone and shows how close each string of your 4-String Bass is to Eb / Half Step Down tuning (D#-G#-C#-F#). Play a string, watch the needle, and turn the peg until the meter glows green. If you prefer tuning by ear, tap any string card to hear its reference tone.

Other 4-String Bass tunings

Standard

Standard (EADG) E-A-D-GEb / Half Step Down D#-G#-C#-F#D Standard D-G-C-F

Drop

Drop D D-A-D-GDrop C C-G-C-F

Alternative

Low C C-A-D-GLow B B-E-A-D

Chords for this tuning

CGDAEFAll 4-String Bass chords →
How do I tune my 4-String Bass to Eb / Half Step Down?

Allow microphone access, pluck a string, and the tuner will detect it automatically. The needle shows whether the string is flat or sharp — adjust until the reading is within ±5 cents (D#-G#-C#-F#).

Which notes are used in Eb / Half Step Down tuning?

Eb / Half Step Down tuning for 4-String Bass uses the notes D#-G#-C#-F#, listed from the lowest string to the highest.

Can I tune without a microphone?

Yes. Every string card plays a reference tone — tap it and match your string to the sound by ear.