You can use a clip-on digital guitar tuner for hands-free guitar tuning. Guitar strings go out of tune as they are played, and a clip-on tuner lets you tune without plugging in a cord. The clips are made to fit on the heads of guitars and pick up vibrations from string tones. A guitar tuner in vibration mode does not pick up other sounds from the band or audience, so tuning is possible above the din. A clip-on digital tuner will work for a bass, electric or acoustic guitar.
Clip the digital guitar tuner onto the head stock of a guitar. Do not let the tuner block any of the twist cranks on the tuning machines.
Turn the tuner on. Set the mode for picking up vibrations or for using the built-in microphone. Vibration mode is recommended if there are any other noises in the room.
Pluck a string and look at the digital readout screen on the tuner. Most models show a needle indicator to the left or right of a central mark to show whether the note is flat or sharp. Tune the string to a higher or lower pitch by tightening or loosening its tuning machine. There will be a color change on the screen or on small light beads to show when the string is in tune.
Keep the tuner clipped to the head of your guitar for easy tuning during a practice or performance.