The complete library
Noise colours · 3
White noise, pink noise, brown noise.
Nature · 11
Rain, ocean waves, wind, fireplace, birds, night insects, stream, campfire, window rain, forest, waterfall.
Places · 6
Café, quiet room, train, cabin hum, soft fan, air conditioner.
Accents · 5
Thunder, singing bowl, wind chimes, slow pulse, cave drops.
How the sounds are prepared
The engineering project documents trimming, filtering, loop crossfades, loudness matching, and peak headroom checks. The sounds are mixed more conservatively where long listening or salient transients warrant it.
Sources and licences
The following list identifies each sound's source, creator, and licence. The engineering project retains more detailed processing records. The release archive should retain the underlying licence and source files.
View all 25 sound credits
- Rain — Rain (1).ogg; ezwa / PDSounds; Public domain
- Thunder — Storm thunderbolts.ogg; stephan / PDSounds; Public domain
- Ocean waves — On a pebble beach.ogg; earthcalling / PDSounds; Public domain
- Wind — Howling wind.ogg; Tvabutzku1234; CC0 1.0
- Fireplace — Bones breaking wood fire ice crackling.ogg; stephan / PDSounds; Public domain
- Birds — Birds chirping in a garden.ogg; Akum20; CC0 1.0
- Night insects — Cicadas in Greece.ogg; Channel R; Public domain
- Café — Restaurant ambience.ogg; stephan / PDSounds; Public domain
- Singing bowl — SingingBowl2.ogg; BambooBeast; Public domain
- Wind chimes — Soothing Ceramic Wind Chimes Sound Effect; Alexander / Orange Free Sounds; CC BY 4.0
- Stream — Water flowing; colorsCrimsonTears; CC0 1.0
- Quiet room — Ambient classroom mono.ogg; rcrossley / PDSounds; Public domain
- Train — Taiwan railways EP727 train cars sounds.ogg; Jidanni; CC0 1.0
- Slow pulse — Procedurally generated 60 BPM dual pulse with rounded low-frequency transients; StillDial project; Project-generated
- Cabin hum — Titan haze sound.ogg; NASA; Public domain
- Cave drops — Drip coffee maker dripping.ogg; hugh / PDSounds; Public domain
- White noise — Procedurally generated by `tools/prepare_audio.py`; StillDial project; Project-generated
- Pink noise — Procedurally generated with frequency-domain 1/f shaping; StillDial project; Project-generated
- Brown noise — Procedurally generated with frequency-domain 1/f² shaping; StillDial project; Project-generated
- Campfire — Campfire sound ambience.ogg; Glaneur de sons; CC BY 3.0
- Window rain — Rain against the window.ogg; cori / PDSounds; Public domain
- Soft fan — Fan (Gravity Sound).wav; Gravity Sound; CC BY 4.0
- Air conditioner — Air conditioner hum 2 (Gravity Sound).wav; Gravity Sound; CC BY 4.0
- Forest — Forest ambience (Gravity Sound).wav; Gravity Sound; CC BY 4.0
- Waterfall — Waterfall and birds sounds.wav; Blight55; CC BY-SA 4.0; processed asset remains available under the same license
Listening safely
The app's percentage controls are not a measurement of sound pressure at your ears. Headphones, speakers, fit, and device volume all affect exposure. Listen at the lowest comfortable level and take breaks.