Blue Noise

How it's made

Source

continuous synthetic masking noise, not an object or a pitched oscillator. Independent seeded pink-noise streams are differentiated over one sample, giving approximately +3 dB/octave power density.

Body

a nonresonant 80–1600 Hz high-pass thins the lows; a 9–18 kHz low-pass rounds the upper edge. The discrete derivative naturally bends away from its ideal slope near Nyquist; no nonlinear drive is used.

Layers

the main blue bed carries the rising spectrum; an independent blue layer above 4.5 kHz adds controllable sharp hiss at 0–35 percent amplitude without narrow resonances or periodic tones.

Envelope

constant sustain for a 10 s loop; no gusts, impulses or level pumping. The renderer crossfades the seam so the stationary noise can run continuously without a boundary click.

Variation

named random streams decorrelate the two layers and channels. Width controls stereo spread; presets offer open masking, rounded treble, thin high-band masking and a centred mono utility bed.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.