Bass C Standard (C F Bb Eb)
Tuner
Bass C Standard (C F Bb Eb) • 4 strings • 440 Hz
Detected
Target
32.7 Hz
Select String
Ready to tune?
Click "Start Listening" and select a string to tune. Auto-detect is assist-only and works best when the string is already close to pitch.
Downtuned tunings lower all six strings by the same interval. Half-step down (Eb tuning) is popular among blues and classic rock players; it reduces string tension slightly and darkens the tone. Full-step down (D standard) is common in metal. The advantage of downtuned over drop tunings is that all your chord shapes remain the same; everything sounds lower.
Note Layout
Notation
C1 F1 Bb1 Eb2
How to Tune
Click "Start Listening"
Allow microphone access when prompted.
Play Each String
Auto-detect will find the string, or click to select manually.
Adjust Until Green
Center the needle and watch for the green "In Tune" indicator.
Tips for Downtuned tunings
Expect looser string tension, consider heavier gauge strings
Chord shapes stay the same, everything sounds lower
Recheck intonation if you tune down significantly
Popular for matching lower vocal ranges
About downtuned tunings
History & context
Eb tuning became a standard for many blues and rock players in the 1960s-70s, with Hendrix and SRV helping popularize the slightly slinkier feel.