Slack Key Ukulele Tuning
Slack Key tuning is G C E G, from string 4 to string 1. Tune each string with the online tuner below, or tap a string on the headstock to hear its note.
- Free, no sign-up
- 4 strings
- Lowest note C4
- Mic stays on your device
Reference pitch (A4)
Hz
Lower it in noisy rooms
Press Start tuning, then play a string
0/4 tuned
Slack Key notes
A4 = 440 Hz| String | Note | Frequency |
|---|---|---|
| 4 | G4 | 392.00 Hz |
| 3 | C4 | 261.63 Hz |
| 2 | E4 | 329.63 Hz |
| 1 | G4 | 392.00 Hz |
About Slack Key tuning
Low string dropped to C for one-finger power chords.
- Open strings: C major (C).
- Range: C4 (261.63 Hz) to G4 (392.00 Hz).
Intervals between strings
- G → C perfect fifth down
- C → E major third
- E → G minor third
How to tune from Standard to Slack Key
Only string 1 changes: lower a whole step, from A4 to G4.
| String | Standard | Slack Key | Change |
|---|---|---|---|
| 4 | G4 | G4 | No change |
| 3 | C4 | C4 | No change |
| 2 | E4 | E4 | No change |
| 1 | A4 | G4 | Lower a whole step |
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Start the tuner
Press Start tuning and allow microphone access. The tuner is already set to Slack Key.
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Play one string at a time
Let a string ring and watch the needle. Auto mode finds the closest string in Slack Key tuning for you.
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Turn the peg until green
Needle on the left means flat (too low), so tighten. Needle on the right means sharp (too high), so loosen. Green means the string is in tune.
Frequently asked questions
What are the notes of Slack Key tuning?
From string 4 to string 1, Slack Key tuning on the ukulele is G4, C4, E4, G4.
What are the string frequencies of Slack Key tuning?
At the standard reference pitch of A4 = 440 Hz, the strings are tuned to G4 392.00 Hz, C4 261.63 Hz, E4 329.63 Hz, G4 392.00 Hz. If you change A4 in the tuner settings, every target changes too.
How do I get from Standard tuning to Slack Key tuning?
Only string 1 changes: lower a whole step, from A4 to G4.
What chord do the open strings of Slack Key tuning make?
If you strum the open strings, they play C major (C). Lay one finger flat across any fret and you get the same chord, one semitone higher for each fret.
Can I tune to Slack Key tuning without a microphone?
Yes. Tap a string on the headstock to hear its note and match it by ear. You can also switch on Repeat to hear the note every few seconds while you turn the peg.
Similar tunings
- Ukulele Tuner Re-entrant GCEA (with a high G), the standard for soprano, concert and tenor ukuleles. G C E A
- Low G Ukulele Tuning GCEA with the 4th string an octave lower, which gives a wider range. G C E A
- Ukulele D Tuning Every string is a whole step higher than standard, for a brighter, traditional sound. A D F♯ B
All ukulele tunings
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