Naja Stereo Widener

Overview
Multiband stereo widening plugin with four independent frequency bands.

Compatible with VST3 and AU formats, stereo in/out.

Includes master section, parametric EQ, Haas delay, and dry/wet mix.

Signal Flow
Stereo input → 4-band crossover splitter → per-band processing (Width, IID, ITD, Bypass).

Bands recombined → Master section → EQ → Haas delay → Dry/Wet mix → Stereo output.

Interface Layout
Vector Scope: real-time stereo visualization.

Band Strips: LO, LM, HM, HI processing columns.

Master Column: global controls, EQ, utilities.

Theme Toggle: light/dark mode.

Crossover Section
Three sliders define LO, LM, HM, HI bands.

XO1: 20 Hz–2,000 Hz (default 250 Hz).

XO2: 200 Hz–8,000 Hz (default 2,500 Hz).

XO3: 2,000 Hz–20,000 Hz (default 8,000 Hz).

Band Processing
Width: 0.0–2.0 (mono to exaggerated stereo).

IID: −12 dB to +12 dB (left/right gain difference).

ITD (Delay): 0–15 ms (arrival-time difference).

Bypass: toggle per band.

Master Controls
Preset Box: load/save presets.

Mono ↔ Stereo toggle.

Master Gain: −24 dB to +24 dB.

Master Width: 0.0–2.0 global multiplier.

Centre Channel: −24 dB to +24 dB with toggle.

Dry/Wet mix with toggle.

Parametric EQ
5 bands (80 Hz, 250 Hz, 1 kHz, 4 kHz, 12 kHz defaults).

Controls: Gain (±12 dB), Frequency, Q (0.1–10.0).

Additional Features
Phase Invert per band.

Haas Delay: 0–15 ms global delay.

Preset management with file-based system.

UI controls: click/drag, double-click reset, right-click value entry.

Best Practices
Set crossovers first to match source.

Keep LO band narrow or unity.

Use IID sparingly (±3 dB typical).

Combine ITD and Width for depth.

Monitor Vector Scope for phase issues.

Check mixes in mono regularly.

Use Dry/Wet for parallel widening.

Apply EQ after widening.

Specifications
Formats: VST3 / AU.

Stereo in/out, minimal latency.

Supports all standard sample rates.

Full parameter automation.

Preset format: .naja files.