Guitar String Buzz: Open Strings vs Fretted Notes

Fret buzz is a mechanical noise. It happens when a vibrating string touches a fret it should clear. To find the cause, play the guitar unplugged and note exactly where the buzz happens. The location tells you more than the volume does.

Separate Buzz From Electrical Hum

If you play electric, unplug before you test. If the buzz is still there with no amp, it is mechanical and this guide applies. Electrical hum is different. It only comes through the amp, and it keeps going even when you mute the strings. It needs its own set of checks.

If you are not sure the noise comes from the strings at all, start with the practical first check for guitar buzz. It compares soft and hard picking and walks through loose hardware. That way you only map the frets once you know the problem is the string touching a fret, not a rattling part.

Map the Buzz Fret by Fret

Use a normal, even pick attack. Play each string open, then fretted at several points along the neck. Write down which notes buzz and which are clean.

Where it buzzes	Likely area	What it points to
Open strings only, fretted notes clean	Nut slot	Slot may be cut too low for that string
Notes in one small area of the neck	A single fret	A fret sitting higher than its neighbors
Most notes on the lower frets	Relief or action	Too little neck bow, or strings set too low overall
Only when you play very hard	Technique and attack	Picking harder than the setup allows
A rattle that does not follow the note	Hardware	A loose part vibrating along with the string

Open Strings Only

When you fret a note, the string’s contact point moves past the nut. That is why fretted notes can be clean while the open string buzzes. A nut slot cut too low is a common cause. Fixing it usually means shimming the nut or replacing it. A technician should do that work.

One Area of the Neck

Say notes at the 7th fret buzz but the frets on either side are clean. The string is probably hitting the next fret up, which sits higher than the rest. This is a local fret problem. Leveling or reseating a fret needs proper tools and experience, so take it to a technician instead of filing it yourself.

All the Lower Frets

If buzz spreads across the first several frets on more than one string, the cause is usually neck relief or overall action. Relief is the slight forward bow in the neck. Action is the height of the strings above the frets. Our guitar action height guide explains what action measures. The guitar setup guide shows how relief and action work together.

Technique and Attack

Every setup has a limit to how hard you can play. Low action plus a heavy pick attack can buzz even when nothing is wrong. If the buzz only appears when you dig in hard, you have two choices: raise the action a little or play slightly lighter.

Hardware

Loose strap buttons, jack nuts, pickup ring screws, and tuner bushings can all make a buzz that sounds like the strings. Play the problem note and lightly touch each part. If the sound stops, you have found the source.

Why Intonation Will Not Fix It

Intonation means moving the saddles so fretted notes stay in tune up the neck. It does not change how close the strings sit to the frets, so on its own it will not stop buzz. Check intonation again after any change to action or relief, because those changes affect it.

Worked Example

A player hears buzz on the low E and A strings from the 1st to the 5th fret. Higher notes and open strings are clean. The buzz covers several lower frets on more than one string, so a single high fret or a low nut slot is unlikely. The next step is to check relief and action with the setup guide.

Narrow It Down

Use the buzz diagnostic tool to work through the pattern you mapped. Then decide whether a setup adjustment is enough or the guitar needs a technician.