3 Ways to Fix Fret Buzz on a Budget Acoustic Guitar

Tighten the truss rod slightly Turn the truss rod 1/8 of a turn at a time to add more relief if the buzz is in the middle of the neck. This counteracts the drop in string tension from lower tunings.

Adjust the saddle or nut If the buzz is near the body, shave a little off the bottom of the saddle. For high nut slots, file them deeper. Go slow—you cannot add material back.

Switch to heavier strings Lighter strings buzz more at low tension. Try 12-53 instead of 11-52. For very low tunings like open D or C#, use 13s to maintain tension and reduce slap.