Canopy and Tide – 3D nature sounds synthesized live in the browser

Canopy & Tide is a free online sleep sound mixer. Pick one or more nature sounds, adjust each level, add a sleep timer and press Play. It works in any modern browser, on phone or desktop, with no app or account.

Most sleep sound apps replay a short recording, and the loop point becomes noticeable after a while. Here every sound is synthesized as it plays: raindrops, bird calls, bubbles and bell strikes are scheduled at random, so the soundscape keeps changing in small ways and never cycles.

Each source also has a position in space. Drops land around you, waves break in front, birds call from the canopy above, and with Distance variation on, every sound slowly drifts nearer and farther. You can switch both effects off in the Space panel if you prefer plain stereo.

The honest answer is that it helps some people, mainly by masking disruptive noise, and the research is still thin. A 2021 systematic review rated the overall evidence that continuous noise improves sleep as very low quality (Riedy et al., 2021). Lab studies using carefully timed pink-noise pulses during deep sleep are promising, but that is a different technique from playing sound all night. Our guide to white, pink and brown noise covers what is known.

Canopy & Tide is a relaxation tool, not a medical device. If you regularly struggle to sleep, talk to a doctor; cognitive behavioural therapy for insomnia (CBT-I) is the first-line treatment recommended by the American Academy of Sleep Medicine.