Music & Ear

These tools use the Web Audio engine built into every modern browser, so timing is accurate to a few milliseconds and tones are generated cleanly at any frequency — no app required. The metronome keeps a rock-steady click for practice, the perfect pitch test tells you how well you name notes with no reference, and the tone generator plays any frequency for tuning instruments or testing speakers and ears.

Everything works with sound on phones, tablets and computers. Browsers only allow audio after you interact with the page, so each tool starts silent until you press its start or play button — if you hear nothing, check your device is not on silent mode and the volume is up.