Drone

Detuned partials, beating slowly against each other.

audio.drone · v1 · renderer audio

0:00 / 0:00

Drone on A2 (110.00 Hz) · 5 harmonics · beating at 0.40 Hz · 30 s

Each partial is two sines a fraction of a hertz apart. Their sum swells and fades at exactly their difference — the beat rate is not a modulator anyone applied, it is what two close frequencies do. The cents figure is derived from it, not the other way round, so the pulse stays where the ear is whatever note you pick.

[data-audio-stage] { display: none; }

Synthesised in the browser

No audio file crosses the wire. The server sends a score — the events, envelopes and synthesis parameters below, plus a 32-byte key — and the samples are made here, from the same byte stream the server would have used. A four-minute piece is about two kilobytes of JSON. That needs JavaScript, so with it switched off there is nothing to play.

The score itself is still public: /api/v1/g/audio.drone returns it, and the synthesis is in resources/js/audio.

Drone on A2 (110.00 Hz) · 5 harmonics · beating at 0.40 Hz · 30 s

Controls · from schema()

Root

Octave

1 4

Low is the point. A drone an octave up stops being a floor and starts being a note.

Partials

2 10

Harmonics above the root: f, 2f, 3f and so on. Each one is a pair of sines, slightly apart.

Beat rate (Hz)

0.05 8

How often each pair swells, in beats per second. Under 1 Hz it breathes; past 4 it turns into a rattle.

Movement

0 1

How far the partials drift in level and the filter in cutoff over the piece. At zero it is completely static, which is its own kind of useful.

Brightness

0 1

How much of the upper harmonics survives. Dark is a cello section; bright is an organ with every stop out.

Stereo spread

0 1

The two halves of each beating pair are placed on opposite sides, so the swell moves across the image instead of sitting in the middle.

Length (seconds)

8 90

Volume (dBFS)

-36 0

Where the mix sits before the master limiter. 0 dBFS is full scale; everything starts 12 dB below it.

Entropy source

Picking a source changes the story on the receipt, never the quality: anything below class A is mixed with the OS CSPRNG before it reaches you. This result actually came from ISS Position.

seed token JZ9KGB9XMPAVPVX0XK3K5SH00W

Re-render keeps this token. Generate replaces it. That is the whole idea.

The file is the render, sample for sample — not a second performance of it. The seed below reproduces it anywhere.

monitor

80%

entropy in

16 bytes

stream used

357 bytes

rejections

duration

242 µs

root

A2 · 110.00 Hz

partials

beat rates

0.3123 0.5911 0.5517 0.7288 0.7667

detune cents

4.908 4.645 2.892 2.865 2.412

slowest beat

one swell every 3.2 s

duration

30 s

Seed receipt

Class C · Observational

The ISS was over 2.88° S, 40.60° W — 2,390 km north of São Paulo — when this was drawn.

Carries only tens of bits of genuine surprise. Always mixed with the OS CSPRNG.

source: ISS Position
observed: 2026-09-14T17:22:07+00:00
latency: 194ms
mixed with: csprng — always

https://www.openstreetmap.org/#map=3/-2.88/-40.60 ↗

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The token is the seed, so this link recomputes the result rather than looking it up. No database, and it works for as long as v1 does.

This page and /api/v1/g/audio.drone run the same code. There is no private endpoint.

Drone

Result

Measurements

Seed receipt

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