Noise

A continuous white- or pink-noise source with optional independent stereo channels.

What it does #

Noise produces an aperiodic audio signal without requiring a trigger or phase source. White mode distributes energy evenly per hertz, while Pink mode tilts the spectrum so that successive octaves carry roughly equal energy.

Controls and ports #

Control	Label	Official description
type	Noise Type [white or pink]	Selects the random distribution to be either white (equal energy per frequency) or pink (equal energy per octave)

Practical uses #

• Use White noise as a bright source for percussion, wind, breath, or subtractive synthesis.
• Use Pink noise when you want a darker, more evenly balanced spectrum across musical octaves.
• Filter or sample the output to derive random modulation, or enable stereo for a decorrelated noise bed.

Things to know #

• Noise runs continuously; it does not wait for a trigger and it does not hold one random value like Dice.
• White describes the spectrum, not a fixed amplitude: instantaneous samples still vary pseudo-randomly in a bipolar range.
• Pink mode is generated by filtering and mixing several white-noise values, so its level and peak distribution are not identical to White mode.
• At higher host sample rates the recovered implementation holds each generated value for several samples, using an update interval of floor(sample_rate / 44100) samples.
• Stereo mode uses two separately seeded random generators; mono mode uses one stream for both output lanes.

Technical details #

A high-confidence Nitro implementation candidate supports the technical summary, but the visible-module mapping remains inferred.

The confirmed noise/noise body seeds two Random states from Bitwig's host random source. White mode calls the generator directly. Pink mode updates three filter states as b0 = 0.99765*b0 + 0.099046*w0, b1 = 0.963*b1 + 0.2965164*w1, and b2 = 0.57*b2 + 1.0526913*w2, then outputs b0 + b1 + b2 + 0.1848*w3. A sample-and-hold stage refreshes the result every floor(sample_rate / 44100) samples, which yields the host rate at 44.1/48 kHz and approximately 44.1-48 kHz at common higher rates.

Nitro port	Type
out	OutputAudioPortType

Open questions #

• Measure RMS and peak level for White and Pink, including the settling behavior of the pink filter.
• Confirm stereo correlation, project-reload seeding, duplicate-module seeding, and offline-render repeatability.
• Check uncommon sample rates where integer division makes the effective random update rate less intuitive.

Version and sources #

Checked against Bitwig Studio 6.0.6. This page combines Bitwig's module metadata, the existing Grid course and guides, and Nitro analysis where the mapping is strong enough to support a technical statement.

Related material #

• Grid Modules course reference

Return to Bitwig Grid Modules or the Grid Modules course lesson.