SUB ORBIT

Mono-safe low-end stereoizer for VST3 and AU. Widens bass frequencies while preserving full mono compatibility.

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SUB ORBIT splits your signal with a Linkwitz-Riley crossover, applies quadrature allpass stereo widening to the low band, and recombines cleanly. Sum to mono with zero phase cancellation.

Features

• Quadrature allpass stereoization below a configurable crossover
• Linkwitz-Riley crossover (60-180 Hz) for transparent band splitting
• Sidechain-driven width ducking for automatic kick/bass clarity
• Real-time goniometer with phosphor persistence and CRT aesthetic
• Correlation meter showing mono safety at a glance
• CHECK MONO audition button for instant mono compatibility checks
• Supports 44.1, 48, 88.2, 96, 176.4, and 192 kHz sample rates
• Resizable UI (Cmd+1/2/3)

Parameters

Parameter	Range	Default	Description
Orbit	0-100%	0%	Stereo width amount
Range	60-180 Hz	100 Hz	Crossover frequency
SC Amount	0-100%	100%	Sidechain ducking depth (no UI knob — use DAW automation)
SC Attack	0.1-100 ms	10 ms	Sidechain envelope attack time
SC Release	1-3000 ms	300 ms	Sidechain envelope release time

Signal Flow

Input (Stereo)
  |
  +-- Linkwitz-Riley Crossover (at Range Hz)
  |     |
  |     +-- Low Band --> Mono Sum --> Quadrature Allpass Pair
  |     |                                |
  |     |                    cos(alpha)*I + sin(alpha)*Q --> Left
  |     |                    cos(alpha)*I - sin(alpha)*Q --> Right
  |     |                        ^
  |     |                        alpha = Orbit * (1 - sidechain ducking)
  |     |
  |     +-- High Band --> passed through unmodified
  |
  +-- Recombine (Low Widened + High Passthrough)
  |
Output (Stereo)

Quick Start

1. Insert SUB ORBIT on a bass bus or stereo track
2. Turn up Orbit to widen the low end
3. Adjust Range to set where widening stops
4. Route a kick drum to the sidechain input to auto-duck width on transients
5. Watch the goniometer and correlation meter to stay mono-safe
6. Hold CHECK MONO to audition the summed output

Download

Platform	Installer
macOS (Universal)	SubOrbit-macOS-Installer.pkg
Windows (x64)	SubOrbit-Windows-Installer.exe
Linux (x64)	.deb | .tar.gz

See INSTALL.md for installation instructions.

Build from Source

cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build --config Release -j4
ctest --test-dir build --output-on-failure

Requires CMake 3.24+ and a C++20 compiler. Dependencies (JUCE 8.0.12, Catch2 v3.7.1) are fetched automatically.

See DEVELOPMENT.md for debug builds, Xcode setup, and formatting.

Stack

JUCE 8.0.12 · CMake 3.24+ · C++20 · Catch2 v3.7.1

Keyboard Shortcuts

Shortcut	Action
Cmd+1	Small UI
Cmd+2	Medium UI
Cmd+3	Large UI
Right-click	Size menu

License

MIT

Links

• echoeslabmusic.com
• Installation Guide
• Development Guide
• Changelog