Fret buzz on the first few frets

Fret buzz near the nut is usually due to incorrect string geometry: low nut, too straight or inverted neck, uneven frets, or a setup incompatible with the caliper and tuning. It does not necessarily imply that the entire instrument's action is too low.

Not always. Raising the action can mask the symptom, but it does not correct the cause. If the origin is in the nut, in uneven frets, or in the neck's curvature, you must diagnose and act on that point. Raising the action too much worsens playability without resolving the root problem.

Yes. Too deep or poorly cut slots leave the string excessively close to the first fret. In that case, the fret buzz appears in the air or on the first few frets, although the rest of the fretboard functions properly. The solution may be to correct or replace the nut, not just raise the bridge.

An excessively straight or inverted neck curvature reduces the string space over the first frets and favors fret buzz. The truss rod adjustment must be made by measuring the curvature; a blind turn can improve one area and worsen another.

Yes. A higher fret than the adjacent ones, or partially raised, causes the string to hit when vibrating. The diagnosis is confirmed by measuring and checking the level; sometimes a localized leveling is sufficient, while other times a more extensive work or a refret is required.

A different gauge or a heavier tuning changes the tension and vibration amplitude of the strings. A setup intended for another set may be too short. After changing the gauge or tuning, it is advisable to check the truss rod, nut, action, and, if necessary, the bridge geometry.

A video helps locate the string, frets, and conditions where the noise appears, but it does not replace the inspection. String height above the first fret, fretwell depth, fret leveling, and neck curvature require measurement in the workshop.

When fret buzz occurs even with high action, a note is completely dead, there are visible raised frets, the nut is damaged, the neck is visibly warped or the problem worsens quickly. In those cases, it is not advisable to continue adjusting at home.

According to the cause: instrument diagnosis, full setup, correction or replacement of nut, fret leveling and polishing, truss rod adjustment, or, if wear requires it, refret. A refret should not be assumed without prior measurements.

Keep humidity stable, check the setup after changing caliper or tuning, don't fill the nut with improvised materials and avoid extreme twists of the truss rod without measuring. Replace worn strings before diagnosing abnormal vibrations.