Credits.
Every sound is released under CC0 1.0 or synthesized by us and dedicated to the public domain. Huge thanks to BigSoundBank.com and Joseph SARDIN (license terms).
Busy Office
CC0- File
- /sounds/busy-office.mp3 · 60s · stereo · 706 KB
- Source
- “Small Restaurant Conversations” by Joseph SARDIN & Axeline T., https://bigsoundbank.com/small-restaurant-conversations-s3542.html · CC0 1.0 (Public Domain Dedication)
- Source
- “Quick Keyboard” by Joseph SARDIN, https://bigsoundbank.com/quick-keyboard-s1734.html · CC0 1.0 (Public Domain Dedication)
- Synthesized
- HVAC room tone (filtered pink noise) generated with numpy
- Edits
- Composite: conversations low-passed at 2.5 kHz (muffled, 'across the office'), two bursts of keyboard typing layered in, synthesized HVAC room tone added. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
- File
- /sounds/meeting-starting.mp3 · 60s · stereo · 706 KB
- Source
- “Crowd of 50-60 People #1” by Joseph SARDIN, https://bigsoundbank.com/crowd-of-50-60-people-1-s3515.html · CC0 1.0 (Public Domain Dedication)
- Source
- “Chair” by Joseph SARDIN, https://bigsoundbank.com/chair-s0666.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Composite: crowd chatter (gentle 6 kHz low-pass) with three chair-movement passages layered at different times. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
- File
- /sounds/busy-terminal.mp3 · 75s · stereo · 882 KB
- Source
- “King's Cross St. Pancras Station (London)” by Joseph SARDIN, https://bigsoundbank.com/king-s-cross-st-pancras-station-london-s0639.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:20-1:37. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
- File
- /sounds/traffic-street.mp3 · 60s · stereo · 706 KB
- Source
- “London Street” by Joseph SARDIN, https://bigsoundbank.com/london-street-s0641.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:15-1:17. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
Bad Signal
CC0- File
- /sounds/bad-signal.mp3 · 40s · mono · 315 KB
- Synthesized
- Fully synthesized by BusyAudio with numpy: high-passed hiss, random crackle impulses, sample-and-hold 'garbled voice' band-limited noise with syllabic modulation, 217 Hz GSM-style interference bursts, and random dropouts; band-limited to 250-3400 Hz.
- Edits
- Original work, dedicated to the public domain (CC0) by BusyAudio. Seamless 40 s loop, normalized to about -20 LUFS, MP3 mono.
Construction
CC0- File
- /sounds/construction.mp3 · 60s · stereo · 706 KB
- Source
- “Urban Works #1” by Axeline T., https://bigsoundbank.com/urban-works-1-s3526.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:10-1:12. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
Crying Baby
CC0- File
- /sounds/crying-baby.mp3 · 60s · mono · 471 KB
- Source
- “1 month baby crying” by Joseph SARDIN, https://bigsoundbank.com/1-month-baby-crying-s0881.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:05-1:07, mono. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3 (mono).
Coffee Shop
CC0- File
- /sounds/coffee-shop.mp3 · 60s · stereo · 706 KB
- Source
- “Coffee Shop at the Capucins” by Joseph SARDIN, https://bigsoundbank.com/coffee-shop-at-the-capucins-s2561.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:30-1:32. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
Subway Ride
CC0- File
- /sounds/subway.mp3 · 60s · stereo · 706 KB
- Source
- “Recent metro, interior” by Joseph SARDIN, https://bigsoundbank.com/recent-metro-interior-s3042.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:10-1:12. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
- File
- /sounds/rain-thunder.mp3 · 75s · stereo · 882 KB
- Source
- “Rain and Thunder #2” by Joseph SARDIN, https://bigsoundbank.com/rain-and-storm-2-s0740.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:20-1:37. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
- File
- /sounds/doorbell-dog.mp3 · 28s · stereo · 331 KB
- Source
- “Small Dog Barking Behind Door” by Joseph SARDIN & Axeline T., https://bigsoundbank.com/small-dog-barking-behind-door-s3537.html · CC0 1.0 (Public Domain Dedication)
- Source
- “Doorbell #2” by Joseph SARDIN, https://bigsoundbank.com/doorbell-2-s0160.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Composite: doorbell layered at the start of a 28 s dog-barking excerpt. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
- File
- /sounds/keyboard-typing.mp3 · 50s · mono · 393 KB
- Source
- “Quick Keyboard” by Joseph SARDIN, https://bigsoundbank.com/quick-keyboard-s1734.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Excerpt 0:02-0:54, mono. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3 (mono).
Brown Noise
CC0- File
- /sounds/brown-noise.mp3 · 30s · mono · 236 KB
- Synthesized
- Fully synthesized by BusyAudio with numpy: Gaussian white noise shaped in the frequency domain to a -6 dB/octave (1/f²) 'brown' slope, sub-25 Hz and above-9 kHz gently rolled off. FFT shaping is circular, so the loop is seamless by construction.
- Edits
- Original work, dedicated to the public domain (CC0) by BusyAudio. 30 s seamless loop, about -20 LUFS, MP3 mono 64 kbps.
White Noise
CC0- File
- /sounds/white-noise.mp3 · 30s · mono · 355 KB
- Synthesized
- Fully synthesized by BusyAudio with numpy: flat-spectrum Gaussian noise with gentle roll-offs below 30 Hz and above 16 kHz (circular FFT shaping, seamless).
- Edits
- Original work, dedicated to the public domain (CC0) by BusyAudio. 30 s seamless loop, about -24 LUFS (white noise is bright, so it ships a little quieter), MP3 mono 96 kbps.
Pink Noise
CC0- File
- /sounds/pink-noise.mp3 · 30s · mono · 295 KB
- Synthesized
- Fully synthesized by BusyAudio with numpy: Gaussian noise shaped to a -3 dB/octave (1/f) 'pink' slope (circular FFT shaping, seamless).
- Edits
- Original work, dedicated to the public domain (CC0) by BusyAudio. 30 s seamless loop, about -22 LUFS, MP3 mono 80 kbps.
Fan / AC Hum
CC0- File
- /sounds/fan-noise.mp3 · 45s · stereo · 442 KB
- Source
- “Ventilation #5” by Joseph SARDIN, https://bigsoundbank.com/ventilation-5-s3598.html · CC0 1.0 (Public Domain Dedication)
- Source
- “Electric fan #2” by Joseph SARDIN, https://bigsoundbank.com/electric-fan-2-s0079.html · CC0 1.0 (Public Domain Dedication)
- Synthesized
- Faint 100/200 Hz motor hum generated with numpy
- Edits
- Composite: a 7.5 s seamless cycle of the electric fan tiled to 45 s over the ventilation recording (-5 dB), plus a faint synthesized motor hum, low-passed at 9 kHz. Loudness-normalized to about -21 LUFS, peak limiter, seamless 45 s loop, MP3 80 kbps.
- File
- /sounds/airplane-noise.mp3 · 45s · stereo · 442 KB
- Synthesized
- Fully synthesized by BusyAudio with numpy (no flight recordings): low-passed brown noise rumble with slow drift, band-passed pink noise for cabin air, and two detuned 117 Hz harmonic engine drones that beat slowly. All modulations are periodic in the loop length, so the loop is seamless.
- Edits
- Original work, dedicated to the public domain (CC0) by BusyAudio. 45 s seamless loop, about -21 LUFS, MP3 stereo 80 kbps.
Driving
CC0- File
- /sounds/driving.mp3 · 60s · stereo · 706 KB
- Source
- “Car interior, 90 km/h” by Joseph SARDIN & Axeline T., https://bigsoundbank.com/car-interior-90-km-h-s3097.html · CC0 1.0 (Public Domain Dedication)
- Source
- “Car turn signals #1” by Joseph SARDIN, https://bigsoundbank.com/blinker-s1021.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Composite: car interior excerpt from 0:30, low-passed at 7 kHz, with a 6.5 s turn-signal passage layered at 0:33. Trimmed, loudness-normalized to about -20 LUFS (peak limiter at -1 dBFS), made into a seamless loop with a 2 s equal-power crossfade, resampled to 44.1 kHz and re-encoded to MP3.
Call Waiting
CC0- File
- /sounds/call-waiting.mp3 · 20s · mono · 119 KB
- Synthesized
- Fully synthesized by BusyAudio with numpy: a generic 660 Hz double beep (two 0.22 s tones, 10 s apart) over faint phone-band line noise. Deliberately not modelled on any carrier's or country's call-waiting tone.
- Edits
- Original work, dedicated to the public domain (CC0) by BusyAudio. 20 s seamless loop, band-limited to 300-3400 Hz, about -24 LUFS, MP3 mono 48 kbps.
- File
- /sounds/baby-shush.mp3 · 30s · stereo · 234 KB
- Source
- “Heart Beat #4” by Joseph SARDIN, https://bigsoundbank.com/heart-beat-4-s1929.html · CC0 1.0 (Public Domain Dedication)
- Synthesized
- Rhythmic shushing (band-passed pink noise, 1.8-6.5 kHz, about one 'shhh' per 1.6 s) and a soft low-passed noise bed generated with numpy
- Edits
- Composite: the heartbeat was cut to a whole number of beats (36 beats, about 29.7 s, found by autocorrelation) so the rhythm never stutters at the seam, then low-passed at 320 Hz for a muffled 'womb' tone and mixed with the synthesized shush. Loudness-normalized to about -21 LUFS, peak limiter, MP3 64 kbps.
Airport Gate
CC0- File
- /sounds/airport-gate.mp3 · 60s · stereo · 706 KB
- Source
- “Crowd of 50-60 People #1” by Joseph SARDIN, https://bigsoundbank.com/crowd-of-50-60-people-1-s3515.html · CC0 1.0 (Public Domain Dedication)
- Synthesized
- Generic ascending three-note bell chime (G4-B4-D5) and an unintelligible 'PA voice' made from a formant-filtered pulse train with random syllable lengths (voice-like rhythm, no words), plus hall reverb and HVAC air, all generated with numpy
- Edits
- Composite: the crowd recording (from 0:40, low-passed at 4.5 kHz) placed in a synthesized 2.2 s hall reverb, with two chime + announcement passages at 0:06 and 0:36. No real PA recordings are used. Loudness-normalized to about -20 LUFS, peak limiter, seamless 60 s loop, MP3 96 kbps.
Gentle Rain
CC0- File
- /sounds/gentle-rain.mp3 · 60s · stereo · 706 KB
- Source
- “Summer Rain on Terrace” by Joseph SARDIN, https://bigsoundbank.com/summer-rain-on-terrace-s1019.html · CC0 1.0 (Public Domain Dedication)
- Source
- “Rain on concrete” by Joseph SARDIN, https://bigsoundbank.com/rain-on-concrete-s1289.html · CC0 1.0 (Public Domain Dedication)
- Edits
- Composite: 'Summer Rain on Terrace' from 0:20 with 'Rain on concrete' from 0:08 at -5 dB, each made into a seamless 60 s loop (2 s equal-power crossfade), low-passed at 11 kHz. Both sources were checked for low-frequency bursts (no thunder). Loudness-normalized to about -21 LUFS, peak limiter, MP3 96 kbps.
Total audio: 11.5 MB across 22 files. The BusyAudio logo, icons and interface are original works. A plain-text copy of this page lives in LICENSES.md in the source repository.