Acustica Audio has announced their Purple 4 plugin suite, described as an ‘extensive collection of legendary passive equalizers’. The update introduces the new Purple 4 MT Ultra plugin and brings several improvements to the suite.
Purple 4 now contains eight individual plugins, emulating both authentic vintage units and modern re-issues of passive equalizer designs. The suite is available in VST3, AAX, and AU formats.
The update includes the addition of the Purple 4 MT Ultra. This upgrade also brings essential improvements such as a resizable GUI, various listening modes, an upgraded plugin engine, bug fixes, and performance optimizations for a more efficient and stable user experience.
The Purple 4 suite consists of the following separate plugins:
- Purple 4 P1 (Vintage tube-based, passive program Equalizer).
- Purple 4 PAA (Tube-based passive program Equalizer reissue).
- Purple 4 M5 (Classic mid-range tube EQ).
- Purple 4 M5V (Vintage classic mid-range tube EQ).
- Purple 4 H2 (Vintage single-channel tube EQ).
- Purple 4 HLF (Passive 12dB/oct high/low pass filter).
- Purple 4 Pre (Preamp standalone module).
- NEW Purple 4 MT Ultra (Mastering True Stereo EQ).
Purple 4 MT Ultra is described as a high-end stereo mastering equalizer plugin inspired by a renowned solid-state EQ. It offers dual independent controls for left and right channels per EQ band, which can be linked, and supports M/S (Mid/Side) processing. It also includes features like precision filtering and enhanced saturation.
Key Features:
- Faithful Analog Hardware Emulations: Includes a total of 8 different standalone plugins, each replicating legendary studio EQs and preamps.
- New MT Ultra Equalizer: A mastering-grade equalizer designed with ultra-detailed bass, high dynamic range, and refined top-end clarity.
- Advanced Monitoring Options: Offers multiple precision listening modes—Delta (Δ), Left/Right (LR), Mid (M), and Side (S)—for improved mix accuracy and stereo field analysis.
- Hyper Technology: Proprietary modeling approach delivering improved processing efficiency, reduced CPU usage, and ultra-realistic analog response.
- Factory Presets: Developed by world-renowned sound engineers.
- Adaptable GUI: Fully resizable user interface.
Technical Information:
- Supported formats: VST3, AAX, and AU.
- Available sample rates: 44.1, 48, 88.2, and 96 kHz.
- Compatible with Windows 10 and 11.
- Compatible with macOS 10.15 (Catalina) to macOS Sonoma (version 14.x).
- Intel, AMD, and ARM compatible.
- Native Apple Silicon support (Rosetta not supported).
Pricing and Availability:
Purple 4 is available now with an introductory price of €79 (62% off the regular price of €209). This introductory offer is valid until June 11, 2025.
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