Crossover-2

A two-band Linkwitz–Riley crossover that separates low and high frequency regions.

What it does #

Crossover-2 divides one signal at a chosen transition frequency. Frequencies below the split predominantly appear at Low, while frequencies above it predominantly appear at High, allowing the two bands to be processed differently and optionally recombined.

Controls and ports #

Control	Label	Official description
freq	Freq	Transition frequency between the low and high bands

Practical uses #

• Keep bass centered and dry while widening, chorusing, distorting, or delaying only the high band.
• Apply different dynamics or saturation to lows and highs, then mix the bands again.
• Inspect or modulate spectral regions independently in experimental control-signal patches.

Things to know #

• A crossover is a matched pair of filters, not two brick-wall frequency selectors; both outputs overlap around Frequency.
• Processing either band changes how perfectly the two paths reconstruct when mixed again.
• The recovered core is explicitly named Linkwitz–Riley and runs in the Grid's 4x domain.
• The exact summed polarity, slope, cutoff calibration, and reconstruction gain should still be confirmed with an impulse or sweep.

Technical details #

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

The exact filter/LR2 body exposes in, freq, outLow, and outHigh, owns a LinkwitzRiley2_2Pole processor, converts Frequency through a helper to the filter's half-W coefficient, and produces band 1 and band 2 for each of four Grid sub-samples. Its filter state resets on start. The imported Linkwitz–Riley class is not expanded in this Nitro body, so exact coefficient equations and visible-frequency calibration remain outside the recovered wrapper.

Nitro port	Type
in	InputAudioPortType
freq	InputAudioPortType
outLow	OutputAudioPortType
outHigh	OutputAudioPortType

Open questions #

• Impulse-test Low plus High for polarity, flatness, latency, and sample alignment across the audible Frequency range.
• Measure slope, -6/-3 dB crossing level, cutoff calibration, modulation smoothing, and behavior near the frequency limits.
• Test stereo independence, reset transient, and audio-rate Frequency modulation.

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 Grid: Recreate Serum Hyper and Dimension

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