Strike a virtual tuning fork at standard pitch or any frequency you choose. It plays a realistic tone that slowly fades, for tuning by ear.
Free, no sign-up
415–446 Hz presets
Tune by ear
Pitch
Hz
A4 · Concert pitch
Standard pitches
A4 reference
Pitch
Where it’s used
vs 440
415 Hz
Baroque & early music
−101¢
432 Hz
Alternative / “Verdi” pitch
−32¢
435 Hz
19th-century French diapason
−20¢
440 Hz
International standard (ISO 16)
0¢
442 Hz
Many European orchestras
+8¢
443 Hz
Berlin & Vienna orchestras
+12¢
444 Hz
Bright modern pitch
+16¢
Tuning by beats
Strike the fork and play the same note on your instrument. If they are slightly different, you will hear a slow pulsing called beats. The closer you get, the slower the pulsing, until it stops completely.
Press Space to strike again without using the mouse.
How to use the tuning fork
Why use it
A tuning fork gives you a clean note to tune to by ear, without a microphone, at any standard pitch from 415 to 446 Hz.
How to use it
Pick a reference pitch, tap the fork to strike it, and play the same note on your instrument. Adjust until the slow pulsing stops.
Frequently asked questions
Which tuning fork frequency should I use?
A4 = 440 Hz is the international standard (ISO 16). Many orchestras tune to 442 or 443 Hz. Baroque groups often use 415 Hz, and some musicians prefer 432 Hz.
How do I tune with a tuning fork?
Strike the fork, then play your A string or A key. Listen for “beats”, a slow wobble in the volume. Adjust your instrument until the wobble disappears.
What is the difference between 432 Hz and 440 Hz?
432 Hz is about 32 cents lower than 440 Hz, which is a little less than a third of a semitone. There is no scientific evidence that it has special healing powers, but some players simply like the warmer sound.
