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Spatial Mix

Spatial Mix places two mono sources independently in a stereo scene with a shared distance model.

Parameters

ParameterRangeDefault
Pan A-100.0 – 100.0-50.0
Dist A0.0 – 100.025.0
Pan B-100.0 – 100.050.0
Dist B0.0 – 100.025.0
Gain-12.0 – 12.00.0
Dry/Wet0.0 – 1.01.0

Pan A — Stereo position of Source A, −100 (hard left) to +100 (hard right). Defaults to −50 so the two sources start out separated. Independent from pan_b — that’s the whole point of this node, vs. summing the two sources first and panning the mix.

Dist A — Perceived distance of Source A, 0–100. 0 = right next to the listener (full level, full HF, full width contribution), 100 = far away (level cut, HF rolled off, width narrowed). The amount of attenuation applied is shaped by vol_falloff, hf_falloff, and width_falloff below.

Pan B — Stereo position of Source B, defaulted to +50 (right of center). Same role as pan_a for the second source.

Dist B — Perceived distance of Source B. Same role as dist_a for the second source. Modulate dist_a and dist_b in opposite directions for a “passing each other” effect.

Gain — Output trim, ±12 dB. Applied after the mix — use to recover level when both sources are pushed far away.

Dry/Wet — Equal-power blend between the dry mono sum of A+B (0) and the spatial-mixed stereo output (1). At 1 you get the full positional stereo image; at 0 you get a flat mono mix that ignores all pan/distance settings — useful for A/B-ing the spatial processing.

Additional controls

Vol Falloff — How aggressively volume drops with distance, 0–100%. 0% = distance has no effect on level. 100% = far sources are nearly silent. ~50% (default) gives a natural-sounding rolloff. Not animatable — set this once for the scene and use dist_a/dist_b to move sources within it.

Hf Falloff — How much high-frequency content is rolled off with distance, 0–100%. 0% = distance leaves the spectrum alone. 100% = far sources are heavily darkened. Models the way air absorbs treble over distance. ~50% gives a believable far/near contrast. Not animatable.

Width Falloff — How much the stereo spread narrows with distance, 0–100%. 0% = far sources stay as wide as near ones. 100% = far sources collapse toward their pan point. Subtle but effective for depth — distant sources feel more “point-like” while near sources fill more of the field. Not animatable.

About Spatial Mix

Spatial Mix places two mono sources independently in a stereo scene with a shared distance model. Each source has its own pan and distance; the three falloff sliders (volume, HF, width) define how distance affects the scene as a whole. Think of it as a mini sound-stage — set the falloffs once to match the room you’re imagining (close-mic’d / room-mic’d / far hall), then move sources around within it via dist_a/dist_b. Useful for layering a dry direct signal with a distant version of itself, panning a kick and snare with depth differences, or building stereo dialogue scenes from two mono recordings. Compare with Spatial Lab when you only have one source and want pan + width + Doppler.


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