Standard 7-String Tuning and Why It Matters
A 7-string guitar adds one extra string below the standard six, tuned to B. The full tuning from lowest to highest string is B–E–A–D–G–B–E. That low B string is what separates a 7-string from a standard guitar, and it changes how the instrument feels under your hands and what chords you can play. If you are coming from a 6-string, the first six strings stay in their familiar places—only the new lowest string is different.
Tuning matters because strings drift out of pitch from temperature changes, humidity, playing, and straightforward time passing. A guitar that is even slightly out of tune sounds muddy and wrong, especially when you play chords. The lower the string, the more noticeable the drift becomes, so that new B string needs the same attention as the others.
Key Takeaways
- A 7-string guitar's standard tuning is B–E–A–D–G–B–E from lowest to highest, with the added low B string below the standard six.
- A digital tuner (chromatic or guitar-specific) is the fastest and most accurate method for beginners, and costs between $15 and $50.
- Tune from the lowest string upward, turning the tuning peg toward you to raise pitch and away from you to lower it, and stop when the tuner shows the target note.
- Check your tuning every time you play, because temperature swings, humidity, and string age all pull strings out of pitch within hours or days.
- If a string will not hold pitch or keeps slipping, the tuning peg may need cleaning or the string may need replacement.
Choosing a Tuner: Digital vs. Ear vs. Reference Notes
A digital chromatic tuner is the most reliable tool for a 7-string guitar. Chromatic tuners read any note you play and tell you whether it is sharp (too high), flat (too low), or in tune. They work by detecting the vibration of the string, either through a built-in microphone or a clip that fastens to the headstock. Clip-on tuners are more accurate in noisy rooms and cost $15 to $40. Tuners that plug into a jack on the guitar body work well if your guitar has one, and smartphone apps (like Pano Tuner or GuitarTuna) are free but less reliable because phone microphones vary widely.
Tuning by ear—listening to the pitch and adjusting by feel—is a skill worth learning later, but it requires a trained ear and is much slower. For now, a digital tuner removes the guesswork. If you do not have a tuner yet, you can use a reference note: play a B note on a piano, keyboard, or another instrument, then match your low B string to that pitch by ear. This works but is slower and less precise than a tuner.
Tuning Step by Step with a Digital Tuner
Start with a clip-on tuner fastened to the headstock, or hold a microphone-based tuner near the guitar. Pluck the lowest string (the B string) firmly and let it ring. The tuner will display the note it hears. If the tuner shows a note name and a needle or bar, watch where the needle points: center means in tune, left means flat (too low), and right means sharp (too high).
Turn the tuning peg for that string. The tuning peg closest to the low B string controls that string. Turn the peg toward you to raise the pitch (make it sharper), and away from you to lower the pitch (make it flatter). Pluck the string again after each small turn and watch the tuner. Stop when the tuner shows the target note name (B) and the needle sits in the center. The motion should be slow and deliberate—one-quarter turn at a time—because it is straightforward to overshoot.
Move to the next string (E) and repeat. Pluck, check the tuner, adjust the peg, pluck again. Work your way up through A, D, G, B, and finally E. Tune all seven strings this way. Once you finish, go back to the low B string and check it again—sometimes the tension of tuning the other strings pulls the first string slightly out of pitch. If it has drifted, retune it and check the others one more time.
Common Mistakes That Pull Strings Out of Tune
The most common mistake is turning the tuning peg too far. A quarter turn can move a string several cents (a cent is one-hundredth of a semitone), so small adjustments are better than big ones. If you overshoot and the string goes sharp, turn the peg away from you to bring it back down, then approach the target pitch from below. It is easier to tune up to a note than to tune down past it and correct.
Another mistake is tuning only once and assuming the guitar will stay in tune all day. Strings settle after tuning, especially new ones, and temperature or humidity changes will shift pitch. Check your tuning before every practice session or performance. A guitar that sits in a cold car and then comes inside will go flat as it warms up, and a guitar in direct sunlight will go sharp.
Do not forget to tune the low B string with the same care as the others. Because it is thicker and lower, it is straightforward to assume it is already in tune or to rush through it. The low B is often the most noticeable string when it is out of tune, so it deserves attention.
When a String Will Not Stay in Tune
If a string keeps going flat within minutes of tuning, the tuning peg may be slipping. Check whether the peg turns smoothly or feels loose. If it feels loose, the internal mechanism may be worn, and the peg will need replacement. This is a job for a guitar technician, not something to fix at home.
If a string goes sharp when ready after tuning, it may not be seated properly in the bridge or nut. New strings sometimes need a few minutes to settle and stretch. Play the string gently for a minute, then retune. If an old string keeps slipping, it may be kinked or damaged inside the winding, and replacement is the only fix. A string that is more than a few months old and shows visible wear or discoloration should be replaced anyway.
Alternate Tunings and When to Use Them
Standard tuning (B–E–A–D–G–B–E) is the starting point, but many players use alternate tunings on a 7-string. Drop A tuning lowers the low B to A, giving a deeper, heavier sound popular in metal and progressive rock. Drop G tuning goes even lower. To tune to Drop A, straightforward lower the low B string one semitone (one fret's worth of pitch) until the tuner shows A instead of B. The other six strings stay the same.
If you are learning, stick with standard tuning until you are comfortable with the instrument. Alternate tunings are a tool for later, once you know how the standard tuning feels and sounds. When you do switch tunings, use the same step-by-step method: pluck, check the tuner, adjust the peg, repeat.
Maintaining Tuning Stability Over Time
New strings take time to settle. If you just installed a new set, expect the guitar to go flat within the first few hours of playing. Gently stretch each string by pulling it away from the fretboard (not hard enough to damage it), then retune. Repeat this two or three times. After a day or two of playing, new strings will hold pitch much more reliably.
Store your guitar in a stable environment. Extreme temperature swings—from a cold car to a warm room, or from air conditioning to heat—will shift pitch. A guitar case or gig bag insulates against these changes. If you play in different rooms or outdoors, expect to retune when you arrive. Keep your tuner in your gig bag so it is always with you.
Frequently Asked Questions
Do I need a tuner made specifically for 7-string guitars?
No. Any chromatic tuner will work because it reads the actual pitch of any string, regardless of how many strings the guitar has. A standard chromatic tuner costs less and works just as well as a "7-string tuner." The only advantage of a guitar-specific tuner is that it may have a display designed for guitar notes, but this is a convenience, not a necessity.
What if I do not have a tuner and need to tune by ear?
Tune the low B string to a reference note (a piano, keyboard, or another instrument playing B). Then tune each string to the one below it: pluck the B string, then pluck the E string and adjust until they sound the same pitch. Move up through the strings this way. This method is slower and less accurate than a tuner, but it works in a pinch. A smartphone tuner app is a better backup.
Why does my guitar go flat after I tune it?
New strings stretch and settle for the first few hours. Older strings may have worn tuning pegs that slip. Temperature changes also shift pitch—a cold guitar will go flat as it warms up. If the problem happens every time you tune, the tuning pegs may need service. If it only happens with new strings, play gently for a few minutes and retune.
Can I tune a 7-string guitar the same way as a 6-string?
Yes, the method is identical. The only difference is that you have one extra string to tune at the beginning. Pluck, check the tuner, adjust the peg, and move to the next string. The low B string follows the same process as any other.
How often should I check my tuning?
Check before every practice session or performance. If you play for more than an hour, check again halfway through. Strings drift from playing, temperature, and humidity, so frequent checks keep your guitar sounding right. Once you are comfortable with tuning, it takes less than a minute.