Topics / Bitwig Studio / Bitwig Grid / Bitwig Grid Modules / Grid Display Modules / Spectrum

Spectrum

Bitwig Platform

Spectrum module panel in Bitwig Grid
Spectrum in Bitwig Grid 6.0.6.

A scrolling frequency-domain display for comparing as many as four Grid signals.

What it does

Spectrum transforms incoming signal windows into frequency bins and displays their energy over frequency and time. Up to four inputs can be shown together, making it useful for comparing layers, filter stages, or modulation sidebands.

Controls and ports

Up to four signal inputs and their through outputs are available. The visual assigns each connected stream a trace/color; detailed FFT, averaging, range, and display options belong to the module surface or Inspector and require a UI inventory.

Practical uses

  • Compare oscillator harmonics before and after a filter, shaper, or modulation stage.
  • Find resonances, aliasing, noise bands, or sidebands while keeping all compared paths connected downstream.

Things to know

  • A spectrum is windowed and time-averaged; narrow transients and fast changes can be smeared.
  • Frequency resolution and time resolution trade against each other through FFT window length.
  • The display is evidence for analysis, not proof that a component is absent below the visual floor.
  • Through ports should not be confused with the analyzed or averaged display data.

Technical details

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

The display necessarily performs a windowed real FFT and maps bin magnitude or power to a scrolling UI. The partial spectrum/spectrum_average component stores (fftsize+1) averages and interleaved complex output for each bin, confirming a separate averaging stage, but its event processing was not decompiled. The visible four-input routing, FFT size/window, dB mapping, decay, and through ports remain unrecovered.

Open questions

  • Measure through-port null, FFT size and window, bin scale, floor, averaging/decay, latency, update rate, four-input colors, stereo/voice reduction, and sample-rate dependence.

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.

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

Also matches: Bitwig Spectrum module, Bitwig Grid Spectrum, Spectrum Grid module