Audio Tone Generator
Play & download pure tones by frequency.
Binaural beats need headphones — each ear hears a slightly different frequency and your brain perceives the difference as a pulse.
Tip: start at a low volume. High-frequency tones can be hard to hear and hard on speakers.
This free audio tone generator does three things in one place: play a pure single tone at any frequency in sine, square, triangle or sawtooth — with the matching musical note shown and left/right channel selection — sweep smoothly between two frequencies (linear or logarithmic), or generate binaural beats with an independent frequency in each ear. Use it to test speakers and headphones, match tinnitus, tune instruments, or explore beats. Add a fade to avoid clicks and download any of them as a WAV. Everything is synthesized with the Web Audio API in your browser.