Tuning the strings to each other (relative tuning)
If you don't have a tuner, you can tune the strings to each other. The ukulele will then be in tune with itself — if you play with others, match one instrument or a reference pitch (piano, tuning app, tuning fork).
- Reference pitch. Find a C (middle C on a piano, an app, or a reliably tuned instrument) and tune the 3rd (C) string to it. If nothing is at hand, leave the C string as it is and tune the rest to match it.
- E string. Press the C string at the 4th fret: that is an E. Tune the 2nd (E) string until it sounds the same.
- A string. Press the E string at the 5th fret: that is an A. Tune the 1st (A) string to it.
- G string — two ways. Both work; pick whichever feels easier:
- 4a. Press the E string at the 3rd fret: that is a G. Tune the open 4th (G) string to match.
- 4b. Press the 4th (G) string at the 2nd fret: that is an A. Adjust the G string until it matches the open 1st (A) string.
- Check. Strum the four open strings (G–C–E–A), then play a C major chord. If something "pokes your ear," go through the steps once more.
Tip: sound the fretted and the open string almost together rather than one after the other — beats (a pulsing in-and-out-of-tune shimmer) are easier to hear than pitch differences. If the beating slows down, you are turning the right way.
Step-by-step tuner-based tuning is in the book, pages 42–43.