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Musician Tool

Professional Instrument Tuner

Tune your guitar, bass, or ukulele using your device's microphone. Fast, accurate, and free.

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Ready to tune...
Flat In Tune Sharp

Reference Notes

The Musician's Tuning Guide

How it Works

This tuner uses Auto-Correlation algorithms to analyze audio waves from your microphone. It calculates the fundamental frequency of your string and compares it to the standard A440 pitch reference used worldwide.

Tuning Tips

For the best accuracy, pluck the string firmly but not aggressively. Mute the other strings with your hand to prevent sympathetic vibrations from confusing the sensor. Tuning in a quiet room is highly recommended.

Why 440 Hz?

The standard "Concert Pitch" for the note A4 is 440 Hz. This was established as the international standard in 1939 to ensure that instruments from different manufacturers can play together in perfect harmony.