Why blending sounds works better than one alone
A single noise colour can feel monotonous after a few minutes. Adding a small amount of a second texture — say, brown noise as the base with a hint of rain on top — gives the ear enough variety to relax into without ever becoming busy. The mixer is built around that principle: a few sliders, no fiddly menus, set it and forget it.
What each track is good for
White noise masks chatter and notifications best — the high-frequency content covers human speech. Pink noise is white softened — gentler on the ears for long sessions. Brown noise is the deepest — best for sleep and tinnitus relief. Rain adds an organic feel that pure noise lacks.Ocean waves introduce slow rhythmic swells that pull breathing into a slower rhythm.
How the mixer is built
Every track is synthesised in your browser with the Web Audio API. Two random-walk noise buffers — white and brown — feed five tracks through different filter and modulation chains. Pink is white through a lowpass; rain is white through a bandpass; ocean is brown modulated by a 0.1-Hz oscillator that creates the slow wave swells. Nothing is downloaded; nothing is streamed.
Using it for sleep vs. focus
For sleep, start with brown noise around 60% and add a touch of rain or ocean to taste — set the sleep timer to 60 minutes and let it fade out. For focus, bring up pink or white noise to mask chatter and keep rain low — focus benefits from steady, predictable sound. Save your own mix by remembering the slider positions; the page resets each visit so the mixer stays simple.