Sum

Adds every active input together into one unnormalized output.

What it does #

Sum is the expandable multi-input form of Add. It combines multiple values, control signals, or audio signals without automatically reducing their level.

Controls and ports #

The wrapper provides a configurable bank of signal inputs and one output. Each connected inlet contributes directly to the sum; the module's port-count setting determines how many input sockets are shown.

Practical uses #

• Mix several oscillators or modulation sources with minimal patching.
• Collect several offsets or correction signals into one result.
• Use individual gain modules before Sum when each source needs its own level.

Things to know #

• There is no averaging, clipping, or gain compensation; correlated inputs can quickly exceed ±1.
• Opposite-polarity components cancel just as they do with Add.
• Use Blend or a normalized mixer when maintaining level is more important than a literal sum.

Technical details #

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

Confirmed by the mapped Nitro AST: initialize out = 0, then for each configured input perform out = out + in[i]. In compact notation, out = Σ in[i].

Nitro port	Type
in	InputAudioPortType
out	OutputAudioPortType

Open questions #

• None currently.

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
• Bitwig Add and Subtract Module - Simple Math in the Grid

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