How to Use a Chromatic Tuner
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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Clip the tuner to the headstock or plug it into the signal chain, play a string, and read the note name on the display. A chromatic tuner shows the note you played and whether it is sharp or flat, so adjust the tuning peg until the needle or meter centers on the note you want.
Clip the tuner on or plug it in
A headstock tuner clips to the headstock. The Snark ST-2 has a stay-put clip and a display that rotates 360 degrees, so clip it where you can read it, and the Snark SIL-RED has a high resolution display that rotates 360 degrees. A pedal tuner sits in the signal chain instead: the BOSS TU-3W is a pedal tuner with a 1/4-inch audio connection and true bypass. The Korg CA-50 listens through its built-in mic or an optional contact mic.
Set the reference pitch if you need to
A440 is the standard reference pitch. If the group you play with tunes to a different reference, set the tuner to match it. The Snark ST-2 offers pitch calibration from 415 to 466Hz, and the Korg CA-50 adjusts calibration from 410 to 480 Hz in 1 Hz steps and keeps the setting in memory after you switch it off. Check the reference pitch before you start so every string tunes to the same reference.
Play a string and read the display
Play an open string and let it ring while you watch the display. The display shows the note name and a needle or meter that moves sharp or flat. The Korg CA-50 shows the note name in the center of its needle-style LCD, and the BOSS TU-3W shows the note on a 21-segment blue LED meter. Turn the tuning peg until the needle or meter centers on the note, then play the string again to check it.
Work through the strings in order
Tune each string the same way, checking the note name on the display for each string. For standard guitar tuning, the strings read E A D G B E from low to high, so check each string against its note. The Snark ST-2 reads any note with its chromatic mode and vibration sensor, and the Korg CA-50 covers a detection range from A0 at 27.50 Hz to C8 at 4186.01 Hz. When every string reads its note with the meter centered, the instrument is in tune.
Use the reference tone to tune by ear
The Korg CA-50 has a sound out mode that plays reference tones from C4 at 261.63 Hz to C5 at 523.25 Hz through its built-in speaker. Listen to the reference tone, then tune the string to match it. The Snark ST-2 also has a tap tempo metronome built in.
What you need
Snark ST-2 Chromatic Multi-Instrument Tuner
A rechargeable headstock tuner with a full-color display that rotates 360 degrees, pitch calibration from 415 to 466Hz, and a built-in mic or vibration sensor.
- Chromatic mode
- Rechargeable
- Tuner type: Headstock
BOSS TU-3W Waza Craft Compact Chromatic Tuner
A pedal tuner for guitar and bass with a 21-segment blue LED meter, true bypass, and an Accu-Pitch sign function, powered at 9 volts.
- Chromatic mode
- True bypass
- Tuner type: Pedal
Korg CA-50 Chromatic Tuner for Orchestral Instruments
A chromatic tuner with a needle-style LCD, a detection range from A0 at 27.50 Hz to C8 at 4186.01 Hz, and calibration from 410 to 480 Hz.
- Chromatic mode
Snark SIL-RED Silver Snark Chromatic Tuner Red
A chromatic tuner with a high resolution display that rotates 360 degrees and vulcanised rubber joints.
- Chromatic mode
These come from our ranked list Best Chromatic Tuner, which compares them spec by spec.
Frequently asked questions
Do I need to set the tuner to chromatic mode?
Yes, for any note. Chromatic mode reads every note, so it works for any string in the tuner range. The Snark ST-2, BOSS TU-3W, Korg CA-50 and Snark SIL-RED each have a chromatic mode.
Why does the tuner show the wrong note?
The string may be far from its note, so the tuner reads the nearest note it hears. Tune the string toward the note you want and watch the display until the note name matches. A vibration sensor helps in a noisy room: the Snark ST-2 has a built-in mic and a vibration sensor.
How do I tune in a noisy room?
Use the vibration sensor instead of the mic. The Snark ST-2 has a built-in mic and a vibration sensor, so clip it to the headstock and let the sensor read the vibration of the string. The Korg CA-50 also takes an optional contact mic for the same job.
Does the tuner turn itself off?
The Korg CA-50 switches itself off after 20 minutes of inactivity to save battery, and it keeps the calibration and mode settings in memory. The Snark ST-2 is rechargeable, so plug it in over USB when the battery runs low.
Ranked guitar tuners lists
More how-to guides
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