Spread
How far the bands separate — scales the angle assigned to each bin. 0 = mono; 100 = maximum unfurl.
Your sound, unfurled across the field.
AURORA gives each frequency band its own azimuth — lows centred, highs fanning to the sides, or any curve you draw. It turns mono into ultra-wide stereo where the spectrum is physically unfurled across the field, like an aurora spreading its colours. No Haas, no delay tricks: real spectral re-placement by per-bin phase de-correlation — crystalline width that actually survives mono.
Tilt / Map
The frequency→position curve of the fan. Centre = lows-centre / highs-edges; negative leans the width into the lows and reins the air back toward the centre. The character of the fan.
Motion / Sync
The spectral fan opens and closes by modulating the map. With SYNC it locks to tempo — the unfurl pulses with the track (capped under ~20 Hz, no audible AM).
Mono Safe
AURORA's own net: ties the lows to the centre below a cut (50→400 Hz). The ILD is useless under ~1 kHz, so the bottom never widens itself apart.
Duck
The fan closes when the dry hits and reopens in the gaps — the width breathes with the performance instead of sitting static.
Mix · In Phase
Dry/wet by power law (the dry is delay-aligned to the block). IN PHASE folds the wide image to mono-safe in one click.
AURORA is on the way.
It's coming free and open-source, with the first transmissions. Get on the signal and you'll be first to know.
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Free · AGPLv3 · in the works