flatus

a small apparatus for moving air.

A small thing that lives in your menubar and occasionally farts. It is also, by acoustic accident, the same waveform Apple ships in watchOS to push water out of the Apple Watch speaker.

Download for macOS · Apple Silicon · v0.2.2 · unsigned listen in browser

Detecting your machine…

First launch

One paste into Terminal fetches the DMG, drops flatus.app into /Applications, and clears the quarantine bit that otherwise produces macOS's unhelpful "app is damaged" line.

$ curl -fsSL https://flatus.vercel.app/install.sh | bash

Or do it by hand

1Your download is starting. Open the .dmg (or unzip the .app.zip).
2Drag flatus.app into /Applications.
3In Terminal: xattr -cr /Applications/flatus.app. UI-only alternative: System Settings → Privacy & Security → Open Anyway after the first blocked attempt.
4Double-click flatus.app. A small icon appears in your menubar.

Once it is running, the menubar icon is home base. If that icon ever gets dragged away, reopen flatus.app from Applications or Spotlight and the full window will come back as your recovery path.

Instrument

A live preview, rendered in your browser by the same Rust synthesis core. Not a recording, not a mockup, and not especially dignified.

Personality

Pressure 0.70

Seed

Output cap

speakers −6 dBFS headphones −18 dBFS

load wasm…

Waveform comparison of the four personalities — polite-cough, default, biblical, silent-but-deadly — on a shared time axis up to 4 seconds. — four canonical voices, on a shared time axis. these are real waveforms from the pinned fixtures.

Specimens

Four canonical voices. Tap to hear the desktop-aligned specimen; use ↓ .wav if you want the separately pinned canonical file.

Command line

No menubar? No problem. The same instrument ships as a CLI anywhere Rust will go.

$ git clone https://github.com/p-to-q/flatus
$ cd flatus
$ cargo install --path crates/fart-synth
$ fart                              # one shot, default voice
$ fart --personality biblical       # pick a voice
$ fart --seed 42 --render out.wav   # write a WAV; identical to this page
$ fart --list-personalities

Specifications

Spectrogram of biblical.wav across roughly four seconds — energy concentrated between 60 Hz and 2 kHz, six grains, dashed HPF and LPF rails. — spectrogram of `biblical.wav` — seed 3, pressure 0.8, the canonical fixture.

Frequency band	60 Hz – 2 kHz (HPF, LPF)
Sample rate	48 000 Hz
Bit depth	16-bit, signed, little-endian
Channels	1 (mono)
Output cap	−6 dBFS (speakers) · −18 dBFS (headphones)
Session ceiling	30 s
Cooldown	60 s minimum between events
Determinism	(personality, seed, pressure) → bit-identical WAV