STATIC GENERATOR

Static Generator

Draw a spectrogram and hear it. The painted canvas is treated as a time-frequency map and resynthesised by inverse FFT with random phase - which is precisely what noise is, a shaped spectrum with no phase coherence. Raising the coherence control turns the same picture from static into tones.

Brushes include soft and hard deposits, spray, full-spectrum bands and harmonic combs, and text can be exposed directly into the spectrum so a word becomes the literal shape of the noise: visible in any spectrogram, audible only as a shaped rasp.

How to use Static Generator

1. Read the canvas as a spectrogram: horizontal is time, vertical is frequency from 40 Hz to 16 kHz, and brightness is energy.
2. Pick a brush — SOFT, HARD, SPRAY, BAND or COMB — set SIZE and DENSITY, and paint. ERASE removes energy.
3. Or start from a preset plate such as FULL HISS, BETWEEN STATIONS, RAIN, SWEEP or VOICE SHAPED.
4. Use EXPOSE TEXT to write a word into the spectrum. It becomes the shape of the noise.
5. Set PHASE COHERENCE. At 0 the picture is resynthesised as pure static; towards 1 the same picture turns into tones.
6. Set LENGTH, WIDTH and LEVEL, listen, and download the WAV.

Tips

• Load the exported WAV into the Audio Analyzer to see your painting reappear in its spectrogram.
• Horizontal lines become steady tones, vertical lines become clicks, and soft clouds become hiss — that is the whole vocabulary of a spectrogram.

Questions

What is a spectrogram?

A picture of sound: time across, frequency up, and loudness as brightness. It is how audio engineers see what a recording contains, and what this tool lets you draw directly.

How does a picture become noise?

The canvas is treated as a time-frequency map and converted back to audio by an inverse FFT with random phase. Noise is exactly that: energy shaped across frequencies, with no consistent phase relationship.

Can I hear the hidden text?

Not as speech. A word written into the spectrum is visible in any spectrogram but sounds like a shaped rasp. This is the same trick musicians have used to hide images in tracks.

Can I use it as a white noise generator?

Yes. FULL HISS at coherence 0 is broadband noise, and painting only lower frequencies gives darker, pink- or brown-style noise.

This is an instrument and a sound tool, provided for entertainment and experiment. It describes what it measures and does not identify the cause of anything it shows.

Related tools

• Audio Analyzer — Measures any recording: levels, noise floor, clipping, mains hum, codec limits.
• EVP Generator — Type what the voices say; a tracker grid renders them offline to a WAV.
• Ghost Voice — Shifts pitch and vocal tract size independently, so a voice becomes the wrong size.
• Spirit Box — A scanning receiver with a procedural formant voice and a live static bed.

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