Online Tuner

How to use the tuner

This online tuner helps you tune your musical instrument by detecting the pitch of sounds picked up by your microphone and providing reference tones to tune by ear.

Getting started

1. Make sure your microphone is connected and working. Click the "Start Tuner" button to activate the tuner. Your browser may ask for permission to access the microphone; please allow it.
2. Play a note on your instrument near the microphone. The tuner will analyze the sound and display the detected note, frequency, and how many cents it is sharp or flat.
3. Use the gauge to see if you are in tune. The needle should point to the center (0 cents) when your instrument is perfectly in tune.
4. If you need a reference tone, select your instrument from the dropdown menu and click on a tone button to play the corresponding pitch. Adjust your instrument until it matches the reference tone.
5. When you're done, click the "Stop" button to turn off the tuner and stop using the microphone.

A4 Pitch Calibration

The A4 calibration dropdown lets you choose the reference frequency for the note A above middle C (A4), also known as concert pitch. Most modern music uses 440 Hz (ISO 16 standard), but some orchestras and historic performances use slightly higher or lower values:

• 415 Hz — "Baroque pitch". This pitch is a semitone lower than A440 and is a widely accepted standard for historically informed performances of Baroque music (roughly 1600-1760).
• 430 Hz — "Classical pitch". Often used for music from the Classical era (late 18th century), particularly for composers like Mozart and Haydn.
• 432 Hz — Also known as "Verdi tuning" or "scientific tuning", it is not standard in classical practice, but popular in New Age / wellness music for its supposed healing and spiritual properties.
• 435 Hz — "French pitch (Diapason normal)". This was a major step toward pitch standardization in the 19th century. Established by French law in 1859, it became a common standard in many parts of Europe.
• 440 Hz — The modern ISO 16 standard, established in the mid-20th century and officially adopted by ISO in 1955, is the most common worldwide today, used by the majority of musicians, tuners, and DAWs.
• 442 Hz — Common in European orchestras for a brighter sound (esp. Germany, Austria, Scandinavia)

If you are unsure, leave this set to 440 Hz. Only change it if you know your ensemble, instrument, or music requires a different concert pitch.

Troubleshooting

• If the tuner is not responding, ensure that your microphone is properly connected and that you have granted permission for microphone access.
• If you hear no sound when playing a reference tone, check your device's volume settings and ensure that your speakers or headphones are working.
• For best results, use the tuner in a quiet environment to minimize background noise interference.

This tuner works best with monophonic sounds (single notes) rather than chords or complex sounds. For optimal accuracy, try to play clear, sustained notes close to the microphone.

Happy tuning!