Ear Training
Hear reference tones and learn note frequencies.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Ear Training
Press Generate to play the reference tone for the chosen note. This tool plays tones only; it does not listen to you.
How to use this tool
- Choose a note from C4 to C5.
- Press Generate to hear the reference tone and see its frequency.
- Try guessing the note first, then press Generate to check yourself.
Worked example
For A4, the reference tone is 440 Hz, the standard tuning pitch. C4 is 261.63 Hz, a little more than half that frequency.
What this tool does not do / Limits
This tool provides reference tones only, played with your browser audio. It does not use a microphone, does not detect pitch, and does not score your singing or playing.
Frequently asked questions
Why does the tone not play?
Your browser must allow audio on the page, and your device sound must be on. The frequency is still shown even if audio is blocked.
What is A4 440 Hz?
A4 is the note A above middle C, and 440 vibrations per second is the standard reference pitch used for tuning instruments.
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