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ONRI Audio REISEI for Mac Review 2026
ONRI Audio REISEI is a one-screen mastering processor for Mac that combines EQ, dynamic processing, stereo imaging, saturation, compression, limiting, and detailed metering in one interface. Instead of opening several plugins and moving between different windows, REISEI keeps the complete mastering chain around a central spectrum analyzer. The standout feature is PARTIAL EQ, which works with the harmonics already present in your audio rather than treating the signal only as fixed frequency bands. REISEI also includes two dynamic processors, stereo imaging tools, compressor and saturation models, and a four-mode master limiter. The current version is 1.0.4, released in September 2026.
What Is ONRI Audio REISEI?
REISEI is designed as a complete mastering environment rather than a single-purpose effect. Its main idea is simple: keep the important mastering decisions visible on one screen. The name REISEI comes from the Japanese word 冷静, meaning a calm or steady state of mind. That idea is reflected in the plugin’s design. The analyzer is not just a visual display. It is also where you interact with many of the processing controls. You can run the entire chain or turn individual modules off and use REISEI as a single processor on another track. This makes it useful beyond the final master bus.
One-Screen Mastering Interface
The biggest difference between REISEI and a traditional mastering setup is the interface. EQ, dynamics, saturation, stereo processing, limiting, and metering are kept together. You do not need to switch between several plugin windows to see what is happening to the audio. The central analyzer also acts as the workspace. EQ bands, dynamic areas, and stereo controls can be adjusted directly from the display. For producers who prefer to see the whole signal while making changes, this can make the mastering process more organized.
PARTIAL EQ
PARTIAL EQ is the most unusual part of REISEI. A traditional EQ works by boosting or cutting a selected frequency range. PARTIAL takes a different approach by tracking harmonics already present in the audio and allowing you to adjust those harmonic components. This can be useful when a master feels thin, edgy, or lacks density. Instead of simply boosting a broad frequency range, you can work with the harmonic content already contained in the material. PARTIAL can also work in anti-phase to reduce selected harmonic content. The WEIGHT control lets you lean a processing band toward Mid or Side information while keeping the main signal in an L/R structure.
Conventional EQ
REISEI does not force you to use its harmonic processing. It also includes a conventional EQ section with five EQ models. This gives you familiar frequency shaping alongside the more specialized PARTIAL system. You can therefore use REISEI for normal tonal adjustments such as cleaning unwanted low-end energy, controlling harshness, or adding presence. The EQ models are designed to switch without clicks while playback is running, which makes it easier to compare different processing characters.
DE-DYN Dynamic Processing
REISEI includes two independent dynamic processors called D1 and D2. These can be used for jobs such as de-essing, controlling resonances, or reducing frequency areas that become too strong only at certain moments. The SP ADAPT mode works across a selected frequency region instead of remaining fixed at one frequency. This allows the processing to follow moving resonances. There are also dynamic peak and shelf modes. A LISTEN function lets you monitor what is being removed, while a two-dimensional meter shows reduction across both time and frequency.
WIDE Stereo Processing
The WIDE section handles stereo image control while keeping the main signal in L/R. WING-SHARE can increase side energy and can move toward Side-only content at its extreme setting. MONO FADE works in the opposite direction by folding selected material toward the Mid. REISEI also includes PARTIAL WIDER, which uses harmonic tracking to create additional Side information. The plugin’s MONO SAFE function can reduce Side energy when the stereo correlation becomes unsafe. This makes WIDE useful for both creative stereo enhancement and practical mono-compatibility control.
No Traditional M/S Mode
One interesting design choice is that REISEI does not switch the entire processor into a traditional Mid-Side mode. The signal remains L/R from input to output. Instead, the WEIGHT control can blend Mid or Side information into individual processing moves. This approach gives you access to Mid and Side elements without changing the main signal structure of the mastering chain.
COMP Compression
REISEI includes eight compressor characters covering different styles of dynamics processing. The compressor uses a program-dependent Flex-Flow response that adapts to the source material. It also provides RANGE control to limit how much gain reduction can occur. You can choose between PEAK and RMS detection, adjust the knee, change stereo linking, and use parallel mixing. The compressor also supports band-limited processing and sidechain frequency control. This gives you more control than a simple threshold-and-ratio compressor.
SAT Saturation
The SAT section contains 15 saturation models arranged into five groups. These include tape, tube, triode, pentode, transformer, combined models, smooth saturation, and clipping modes. The EV/OD control lets you change the balance of even and odd harmonics. A THD readout with peak hold shows how much harmonic distortion is being added. The PUNCH control can keep transients cleaner while the body of the sound receives saturation. SAG changes how the drive responds to sustained signal levels, helping different models behave more like their intended analog character.
Flexible Processing Order
REISEI does not force every processor into one fixed order. The EQ, compressor, saturation, and DE-DYN modules can be reordered. This is useful because different mastering jobs may require different signal paths. For example, you may prefer to control a resonance before compression, or add saturation before a final EQ adjustment. This flexibility makes REISEI more useful as a complete mastering chain rather than a fixed preset processor.
Key Features of ONRI Audio REISEI
- One-screen mastering workflow
- Central spectrum analyzer
- PARTIAL harmonic-tracking EQ
- Five conventional EQ models
- Two independent DE-DYN processors
- Dynamic resonance and de-essing control
- WIDE stereo processing
- Mono compatibility protection
- Eight compressor characters
- Fifteen saturation models
- Four master limiter modes
- ITU-R BS.1770-4 loudness metering
- True Peak and LRA metering
- PLR and K-System metering
- A/B/C/D comparison slots
- 999 levels of undo
- UNITY gain matching
- Adjustable playback and export quality
- AU and VST3 formats
- Apple Silicon native support
- macOS 14.0 or later
ONRI Audio REISEI Alternatives
iZotope Ozone 12
iZotope Ozone 12 is one of the better-known complete mastering suites. It provides a much broader collection of mastering processors and includes intelligent tools for users who want more assistance during the mastering process. Unlike REISEI, Ozone is available across Mac and Windows and has a wider ecosystem of mastering tools.
Best for: Users who want a larger mastering suite, cross-platform support, and assisted mastering features.
FabFilter Pro-Q 4
FabFilter Pro-Q 4 is a dedicated EQ rather than an all-in-one mastering chain. It provides advanced EQ controls, dynamic EQ, spectrum analysis, Mid-Side processing, and other detailed frequency-shaping tools. It is a strong choice if EQ is the main part of your mastering workflow.
Best for: Engineers who already own separate compressors, saturation, stereo, and limiting tools but want a powerful EQ.
FabFilter Pro-L 2
FabFilter Pro-L 2 is focused on final limiting rather than complete mastering. It provides multiple limiting styles, detailed metering, true-peak limiting, loudness monitoring, and extensive control over the final stage.
Best for: Users who already have their EQ, compression, and saturation covered and mainly need a high-quality mastering limiter.
DMG Audio Limitless
DMG Audio Limitless is another dedicated mastering processor that combines limiting with advanced dynamics and loudness control. It offers more focused control over final-level processing than REISEI, while REISEI covers a wider range of mastering tasks in a single plugin.
Best for: Engineers who want detailed control over limiting and dynamics.
Conclusion
ONRI Audio REISEI is an interesting mastering plugin for Mac users who want to keep the entire process visible in one place. Its biggest advantage is not simply the number of processors. It is the way those processors work together around a single analyzer. The PARTIAL EQ is the feature that makes REISEI stand apart. Instead of treating every EQ problem as a conventional frequency-band adjustment, it can follow harmonic content already present in the source. Combined with the conventional EQ, dynamic processing, saturation, stereo tools, and limiter, this gives mastering engineers a different way to shape a final mix. The main limitation is platform support. REISEI currently requires macOS 14 or later and an Apple Silicon Mac. Intel Macs and Windows systems are not supported, while Pro Tools users also need to consider the lack of AAX.
Technical Details
- Full Name: ONRI Audio REISEI
- Setup App File Name: ONRI Audio REISEI
- Full Application Size:
- Latest Version:
- Setup Type: Offline Installer / Full Standalone Setup
- Developers: ONRI Audio REISEI
System Requirements
- Operating System:
- Memory (RAM):
- Hard Disk Space:
- Processor:
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