Beat Frequency Between Tones

How to use this tool

1. Estimate audible beating and cents detuning between two nearby sine tones.
2. Set first tone, second tone in the indicated units.
3. Calculate and compare beat frequency, second tone detuning.

Try this example

{
  "a": 440,
  "b": 442
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.