ONRIAUDIO REISEI

Mastering,
kept in one view.

REISEI keeps spectrum, EQ, dynamics, stereo image and limiting on a single screen, so every decision is made in context, not buried in tabs.

REISEI — one-screen mastering interface
REISEIOne-screen mastering processor

$399 · one-time license · launch price $299 until 31 August

AU / VST3 · macOS 14+ · Apple Silicon (M1 and later) · Windows planned · one-time license

冷静 — REISEI

REISEI · composure

Hear everything.
Change only what matters.

REISEI (冷静) is the Japanese word for a calm, steady mind. Mastering asks for the same: the clarity to see the whole picture, and the restraint to change only what needs it.

CONCEPT

Mastering isn't arcane.
The analyzer is part of the workspace.

Choosing your own rack of high-end plugins and trying every way to use them is part of the craft's pleasure. It makes the work feel elevated.

Yet more often than not, it feeds both the signal and your judgment with noise: imperceptible waste that quietly clouds the decision.

Mastering asks for less. A few clear moves that make the most of the sound already there, and nothing in between. REISEI keeps only those, in one view.

HEAR THE DIFFERENCE

Before / After

Same source, same level. Only the processing changes.

A · BEFORE
0:00

WHAT IT DOES

Built for judgment.

Six processors on one analyzer, checked against an automated regression suite on every build. For engineers who master for a living, not one-knob shortcuts.

REISEI PARTIAL EQ
01

PARTIAL EQ

Not a filter. A conventional EQ shapes the outline of a sound; PARTIAL works inside it, on the harmonics it is actually made of. It locks onto the harmonics already in the sound and strengthens the ones you choose, phase-coherent — rescaling content that is already there rather than generating anything new. Masters that feel light or edgy settle and sit: the density you reach for with better converters, without the colour and cost of analog. Pull a harmonic the other way and it cancels in anti-phase. WEIGHT leans each band toward Mid or Side — the signal itself stays L/R. And PARTIAL sits alongside a complete conventional EQ — five classic models, from NATURAL to linear phase — so the everyday moves stay everyday.

REISEI DE-DYN
02

DE-DYN

Two dynamic band processors, D1 and D2, fully independent of each other — de-ess with one while the other holds down a resonance. The flagship mode, SP ADAPT, works across the whole region you set instead of sitting at one fixed frequency, so the reduction follows a resonance as it moves and only the moments where energy actually jumps come down. FREQ and BW take that region from a tight spot to a wide span, and THRESH means the same thing however wide you open it — widening never makes it more aggressive, so you can search wide and then narrow down without re-setting the threshold. The other modes are dynamic PEAK bells — you choose the edge, from gentle to surgical — and dynamic HI/LO shelves. LISTEN monitors exactly what is being removed, and a 2D meter draws the reduction across time and frequency, so you can read what happened, when, and where.

REISEI WIDE
03

WIDE

A widener and a monoizer in one, worked by eye and ear. WING-SHARE adds side energy without breaking phase; push it past its switch point and it fades the in-band Mid away, reaching Side alone at the top of its travel. MONO FADE goes the other way, folding a band back toward Mid, so the lows stay mono while the image stays true — and ROUTE decides which of the two comes first. PARTIAL WIDER widens by tracking harmonics: what it adds is pure Side, so folding to mono simply removes it and leaves your centre untouched. Between WIDE and the limiter, MONO SAFE holds the L/R correlation at or above zero, pulling Side back only as far as it takes — fast to protect, slow to let go. MONO FADE is where you shape mono compatibility on purpose; MONO SAFE just catches what gets past. Off, it is not in the signal at all; on, it works even with WIDE bypassed. Grab the band handles in IMAGE VIEW and shape the image where you can see it, with the change under your fingers.

REISEI COMP and SAT
04

COMP & SAT

Program-dependent dynamics and analog colour. COMP's Flex-Flow follows the material, with RANGE to stop over-squashing and PEAK / RMS detection. SAT gives saturation a grammar instead of a single knob: 15 models in five menu groups, EV/OD to re-weight the even and odd harmonics a model generates, and a THD read-out with peak hold so you can see what you added. PUNCH keeps the attack out of the saturation — a kick or snare edge passes clean while the body keeps its colour. SAG makes the drive itself move the way a real supply does under load, and every model carries its own supply profile, so tape, tubes and the clippers behave differently. Two band controls sit on the analyser itself: one decides which part of the spectrum is driven at all, the other band-limits the saturated signal on its way out. COMP, SAT, EQ and DE-DYN can be reordered freely.

REISEI MASTER LIMITER
05

MASTER LIMITER

The finish, metered. Four modes, each its own design rather than a preset of one algorithm — STANDARD (the house sound, and the default), PRESSURE (weight), SMOOTH (the softest; costs noticeably more CPU) and CLEAN (transparent, and the one mode with no IMPACT). A single IMPACT knob, reading −100 … 0 … +100, sets how far each mode leans into its own character; zero is the mode as voiced. Playback and export quality are set independently, and REISEI detects your host's offline render and switches by itself. True-peak detection is always on and follows the quality setting, oversampling the detector up to ×16 at MAX. The ceiling you set is the ceiling you get. Five dither curves at 24 or 16 bit, and a gain-reduction history you can actually read. ITU-R BS.1770-4 metering — Integrated, Short-term, Momentary, LRA and True Peak — with streaming targets (−9 / −14 / −16 / −23 LUFS) and one-click APPLY TARGET: it gets you close, and the meters and your ears finish the job.

REISEI one-screen analyzer
06

One screen, honest

The FFT is the control surface. Every EQ band, cut point and marker sits on the analyzer itself, so you drag the processing onto the sound you are already looking at. Zoom it directly: left-drag to scale, right-drag to box a region and jump straight into it, double-click to go back — and go fullscreen when the detail matters. The same double-click types a value into any knob or band edge, and clears a held reading — true-peak and gain-reduction maxima, loudness, the zoom. Every module has a SOLO switch; engage it and touching a control brings that part under the ear, so a move can be checked instead of guessed at. What SOLO isolates is chosen to suit each module, so it stays useful rather than literal. A UNITY match holds output level to input, so louder never flatters the decision. 999 steps of undo, A / B / C / D, and a build that passes Apple's auval -strict.

The base is L/R. M/S is blended in — not switched to. REISEI has no M/S mode: the master stays L/R from input to output, and WEIGHT folds Mid or Side elements into each move by degree — 30% toward the Mid, fully into the Side, anywhere between. The image stays anchored where you mixed it.

Every module stands on its own. Eight compressor characters, fifteen saturation models, thirteen EQ models — all switching click-free under playback. Not everyone needs all of it. Run the full chain as it was designed, or quiet the screen and put a single processor into a session built on other tools — that is yours to decide, not ours.

IN MOTION

See REISEI work.

Demo video

COMPATIBILITY

Clear purchase information.

FormatsAU / VST3
SystemmacOS 14.0+ · Apple Silicon (M1 and later)
WindowsPlanned for a future release
Sample rates44.1 – 192 kHz
MeteringITU-R BS.1770-4 (Integrated · Short-term · Momentary) · LRA · True Peak · PLR · K-System
LicenseOne-time · 3 activations · key by email
TrademarkVST is a registered trademark of Steinberg Media Technologies GmbH.

PRICING

One price.
One licence.

REISEI

$399

One-time license. Free updates within the version line, three activations.

Launch price — $299 until 31 August

Enter this code at checkout to take $100 off. The offer ends 31 August 2026 (UTC).

Buy REISEI

One-time purchase · free updates within the version line · 3 activations per license

BEFORE YOU BUY

Questions

REISEI runs on macOS 14.0 or later, Apple Silicon (M1 and later), as AU and VST3, at sample rates from 44.1 to 192 kHz. Intel Macs are not supported. A Windows version is planned: macOS came first because that is where the work was proven, and Windows follows as development allows.

Latency depends on the mode you choose. It is reported to your DAW automatically for delay compensation, and the current value is always shown in the interface.

Yes — but not as a mode. The signal stays L/R end to end; per-band WEIGHT blends Mid or Side elements into your EQ moves by degree. You get the M/S reach where you need it, while the stereo image stays anchored in L/R. One exception lives in WIDE. Push WING-SHARE past its switch point and it fades the in-band Mid away, reaching Side alone at the top of its travel; MONO FADE goes the other way, folding toward Mid. ROUTE decides which happens first. That pair is as close to classic M/S as REISEI gets — there is no separate level control for M and S.

At its highest quality settings REISEI is not a light plug-in, and that is a deliberate trade. The PARTIAL models use considerably more computation than the conventional ones — tracking harmonics costs more than filtering a band, and the cost rises with sample rate. It is also why playback quality and export quality are set independently: you work at a setting that keeps the session responsive, and choose NORMAL, HQ or MAX for the bounce. REISEI detects your host's offline render and switches by itself, so there is nothing to remember at the end of a session.

Yes. Every module has its own ON/OFF, so REISEI can run as a single processor on a channel — the compressor alone, or the saturator alone — with everything else bypassed. The models are the same ones the mastering chain uses; there is no reduced version.

Yes. REISEI includes Duo, a skin that redraws the entire interface in two hues chosen to stay distinct under any form of colour vision deficiency — and in greyscale. The five EQ bands run blue to sand to orange in order, each a step brighter than the last, so the order of the bands can be read even when no colour is visible at all, and the over-zero meter zones step down one further stop in brightness. Nothing is hidden and nothing is simplified: it is the same instrument, drawn so that more people can read it. Some people with ordinary colour vision prefer it anyway.

Yes — 14 days, fully unrestricted. No feature limits, no noise, no timeouts mid-session. Run it on real work and decide. The trial needs to reach us once when it starts; after that it runs offline.

Audio keeps passing through unchanged, and your sessions and settings are preserved — a project with REISEI in it never becomes un-openable. Buy a licence and everything picks up exactly where you left off.

A license key arrives by email right after purchase. One licence covers 3 machines, and you can move a machine yourself: deactivate it inside the plug-in, then activate the new one. Activation is online once; after that REISEI runs offline indefinitely, so a studio without a network connection is no problem.

Updates within the version line are free. Payment and delivery are handled through Lemon Squeezy, who act as the merchant of record.

The 14-day trial is unrestricted precisely so you can be certain before you pay, so purchases are generally final. If REISEI will not run correctly on a supported system and we cannot resolve it, write to [email protected] and we will sort it out. Buyers in the EU and UK keep their statutory right to withdraw within 14 days of purchase, unless the download has already begun with your consent.

Yes, and each of the four slots remembers what it is. Load a preset into A and the slot keeps its name, with a rule under it meaning it is still as loaded. Move to B, load something else, and A keeps both. Touch a control and only that slot loses its rule and gains an asterisk. Undo follows the slot too, so the one you are listening to is never rewritten behind you. Four candidates can sit side by side and stay identifiable — and the whole arrangement can be saved to a single file and reopened later.

Yes. Presets and snap groups you create are yours to keep, share, give away or sell — no permission, no royalty. They carry their own file extensions, so a pack is recognisable at a glance. The factory presets themselves may not be extracted and redistributed, and nothing may be presented as official ONRI Audio material, but selling your own work is explicitly welcome.

Yes, 90 days after purchase. The wait is there so that a transfer cannot collide with a refund or a card chargeback, which can be raised months after a sale. Deactivate all your machines first, then write to [email protected] with the new owner's email address and we will move the key across — a transfer takes effect only once it is registered with us. Licences that have been refunded or charged back cannot be transferred and are void. Buying in order to resell as a business is not permitted, and review (NFR) licences are not transferable.

GET REISEI

Try it in your own mix.

Download the trial, run it in your DAW, then unlock the full processor when you're ready.

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Questions? [email protected]

REISEI$399 Download Trial Buy