4Comp: AUv3 Compressor Plugin
FET · VCA · Optical · Vari-Mu
$4.99 · Designed for iPad. Not verified for macOS.
Also Included In
New in 1.1: built-in help for every model and a live VCA transfer curve. Four compressors in one AUv3, each with its own face, meter and sound. 17 presets.
Four analog-style compressors in one AUv3 plugin: FET, VCA, Optical and Vari-Mu. Each is its own DSP engine with its own sound, and the whole interface — face, knobs, meters — changes to match the one you pick.
New in 1.1: tap ? for a quick start and a guide to each model, and watch the live transfer curve on VCA.
FET
Fast gain reduction from a feedback detector, with an all-buttons mode. Hi-hats, drum buses, spiky guitars. Ice-blue face.
VCA
Bus glue with program-dependent AUTO release. Tames transients and spikes without grabbing. Crimson face.
Optical
Smooth, level-dependent release from a modelled photocell — the cell's light memory. Vocals, brass, strings. Electroluminescent-green face.
Vari-Mu
A ratio that rises with level, plus harmonic colour that thickens thin tracks. Mix bus and mastering. Brass face.
Four separate DSP paths
Each model is its own compressor engine rather than a preset over one circuit: feedback FET, two-stage VCA, photocell release, rising-ratio tube. Switch faceplates mid-session and the plugin animates to the new model's look.
Complement it
Stereo link (Linked or Dual Mono), sidechain high-pass, dry/wet mix, input/output and auto make-up gain, a gain-reduction meter styled for each model and 17 presets. Real-time-safe DSP, 0-sample latency by default.
Works in GarageBand, AUM, Cubasis, Loopy Pro and other AUv3 hosts on iPhone and iPad.
Ratings & Reviews
What's new in this version:
• Switching compressor models now keeps the model tabs and Input / Output controls in place
• The Help sheet now follows the selected model's colours
• Moved the Help button beside the model caption
• Added bundle and Umbrex links to your local App Store
• Improved performance
The developer, NATHAN THOMAS MATHIS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- NATHAN THOMAS MATHIS
- Size
- 3 MB
- Category
- Music
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 10 more
- English, French, German, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © Nathan Mathis LLC

