Multi-Band Crossfade

Parameters

Similarity Influence — How much spectral similarity between A and B affects the crossfade per band, 0–1. 0 = uniform crossfade (each band crossfades the same regardless of content). 1 = full content-awareness (bands where A and B are spectrally similar crossfade differently from bands where they’re dissimilar — typically dissimilar bands transition first to avoid muddiness). Adjust to balance content-awareness vs. predictable behavior.

Additional controls

Bands — Number of frequency bands the spectrum is split into for independent crossfading. More bands = finer resolution and more localized crossfade behavior; fewer bands behave more like a broadband crossfade with multiband seams. 8–16 is balanced; higher for surgical content-aware blending.

Slope — Filter slope for the band-splitting crossover network: 6dB, 12dB, 24dB, 48dB per octave. Steeper slopes give cleaner band separation (less overlap between adjacent bands) at the cost of more potential phase artifacts at crossover frequencies. 12 dB is balanced; 24 dB for cleaner separation.

Curve — Per-band crossfade curve: Linear, Eq. Power, S-Curve, Log. See LFO Crossfade’s curve docs — same options apply per-band here.

Phase — Phase reconstruction strategy: Dominant (use the louder input’s phase), Source A (always use A’s phase), Source B (always use B’s phase), Interpolate (interpolate phases between sources). For tonal material, Dominant is usually safest; Interpolate can produce smoother transitions but with more artifacts on phase-sensitive content.

B Loop — When on, Source B is looped to match Source A’s duration if B is shorter. Off plays B once and stops contributing after it ends. Loop is useful for using a short texture/loop as the “B” content while A plays through; off for one-shot crossfading where B has its own natural duration.

About Multi-Band Crossfade

Standard crossfading just mixes two signals proportionally. Multi-Band Crossfade splits both signals into frequency bands and crossfades them independently per band, with similarity_influence controlling whether the per-band transitions are uniform or content-aware. Content-aware mode is unique to K2K: bands where A and B are spectrally similar can transition smoothly without muddiness, while bands where they’re very different can be staggered to avoid the “messy middle” of a standard crossfade. Use it for: clean transitions between disparate sources (different instruments, different recording quality), DJ-style frequency-staggered crossfading, or as a more musical alternative to standard time-domain crossfading on busy mixes. Compare with the simpler LFO Crossfade (broadband, time-domain) and Spectral Magnitude Crossfade (frequency-sweep based).

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