The standard Venezuelan cuatro tuning is A–D–F#–B, from the first string to the fourth. If you’re tuning a Puerto Rican cuatro, the standard tuning is B–E–A–D–G across its five doubled courses. These are two very different instruments, and most people searching for cuatro tuning are working with the Venezuelan four-string version, so that’s where we’ll start.
Standard Venezuelan Cuatro Tuning
The four strings of the Venezuelan cuatro are tuned to these notes, in order:
- 1st string: A
- 2nd string: D
- 3rd string: F#
- 4th string: B
If you’re coming from guitar, the first thing you’ll notice is that the string thickness doesn’t follow a neat pattern from thin to thick. The thinnest, highest-pitched string is actually the 3rd string (F#), and the 4th string (B) sits at roughly the same pitch range as the 1st string. This is not a mistake. It’s the defining feature of the instrument.
What Re-entrant Tuning Means
On a guitar, the strings go from high to low in a predictable staircase. The cuatro breaks that pattern. Its 4th string (B) is tuned an octave lower than you’d expect if the notes simply kept descending. This is called re-entrant tuning, and it’s responsible for the cuatro’s bright, ringing quality when you strum in both directions. Because no single string sits dramatically lower than the others, chords sound balanced and full whether you’re sweeping up or down across the strings.
This also means you can’t just look at the strings and guess which is “highest” or “lowest” by their thickness. Trust your tuner, not your eyes.
Tuning With an Electronic Tuner
The simplest method is a chromatic tuner, either a clip-on device or a free smartphone app. Set it to chromatic mode (not guitar mode, which only detects the six standard guitar pitches) and calibrate to A = 440 Hz, which is the default on most tuners. Then tune each string one at a time, starting from the 1st string (A) and working your way to the 4th (B).
A few practical tips: pluck each string cleanly near the sound hole, let it ring, and watch the tuner’s needle or display. For the F# on the 3rd string, some tuners display this as “Gb,” which is the same pitch. For the 4th string B, remember it should be a low B, close in pitch to the 1st string A, not a high B. If it sounds noticeably higher than the A string, you’ve gone an octave too far and risk snapping the string.
Tuning by Ear (Relative Tuning)
If you don’t have a tuner handy, you can tune the cuatro to itself using fret positions, as long as at least one string is already in tune. Start by getting your 1st string to an A using a piano, pitch pipe, tuning fork, or any reliable reference tone. Then follow this sequence:
- 2nd string (D): Press the 1st string at the 5th fret. That note is D. Tune the open 2nd string to match it.
- 3rd string (F#): Press the 2nd string at the 4th fret. That note is F#. Tune the open 3rd string to match it.
- 4th string (B): Press the 1st string at the 2nd fret. That note is B. Tune the open 4th string to match it.
Notice that the 4th string doesn’t reference the 3rd string. It jumps back to the 1st string at the 2nd fret. This is because of the re-entrant tuning: the 4th string’s B is close in pitch to the 1st string’s A, so it makes more sense to compare them directly. When the two notes are close to matching, you’ll hear a wavering or “beating” sound that slows down and disappears as you get in tune.
The Cambur Pintón Alternative Tuning
There’s one well-known alternative tuning for the Venezuelan cuatro, sometimes called the Freddy Reyna tuning or “Cambur Pintón.” The A, D, and F# strings stay the same. The only change is the 4th string B, which gets tuned an octave higher than in standard tuning. This removes the re-entrant effect and gives the instrument a brighter, more linear sound.
Venezuelan musician Freddy Reyna popularized this approach, and some players still use it today. All the same chord shapes work, so you don’t need to relearn anything. It simply changes the tonal character of your strumming, making the cuatro sound a bit more like a conventional stringed instrument.
Puerto Rican Cuatro Tuning
The Puerto Rican cuatro is a different instrument entirely. It has five courses of doubled strings (ten strings total, in five pairs), and it’s tuned B–E–A–D–G from lowest to highest. This follows the same interval pattern as the bottom five strings of a guitar, just shifted. Unlike the Venezuelan cuatro, there’s no re-entrant tuning here. The strings descend in pitch from high to low in a straightforward way.
If you’re tuning a Puerto Rican cuatro, a chromatic tuner in standard 440 Hz calibration works perfectly. Tune each pair of strings in unison so both strings in a course ring at the same pitch. Getting these pairs perfectly matched is the trickiest part, since even a slight difference between the two strings in a course creates a chorus-like warble that muddies your tone.
Keeping Your Cuatro in Tune
New strings on any cuatro will stretch and slip out of tune constantly for the first few days. This is normal. Expect to retune several times per practice session until the strings settle. Gently stretching each string by pulling it away from the fretboard after installing it speeds up this break-in period.
Temperature and humidity swings also affect tuning. If you move the instrument from an air-conditioned room to a warm outdoor setting, give it a few minutes to acclimate and then retune. Wood expands and contracts with moisture changes, which shifts string tension slightly. Storing your cuatro in its case when you’re not playing helps minimize these swings and keeps you from retuning from scratch every time you pick it up.