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Step 1
Make sure the bottom, or low E string, is in tune. You can do this either by using your tremendous sense of hearing or another instrument that you know is in tune, such as a digital keyboard. Once the low E string is in tune, you can then tell one by one if the other strings of the guitar are out of tune.
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Step 2
Hold your finger on the fifth fret of the bottom or low E string. Pluck the E string and the second string from the bottom, the A string. If you hear a vibration or pulsing in the notes, then the A string of the guitar is out of tune.
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Step 3
Twist the tuning peg to adjust the pitch. If the string is flat, tighten the string. Conversely, if the string is sharp, loosen the string.
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Step 4
Pluck the strings again holding the low E string on the fifth fret. If they are still out of tune, make more adjustments.
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Step 5
Work your way up the other strings following the same procedure. Hold the lower string on the fifth fret. After you get to the high E string there is no way your guitar is out of tune anymore.








