MASTER A TRACK
PEOPLE feel —
AND A SYSTEM
THAT MAKES IT hit.
A focused local mastering workspace for fast decisions, clean monitoring, and export-ready audio without cloud storage or unnecessary noise.
The difference is decided before the render.
Mastering by feel with no reference costs takes. SPIRAL puts the readouts, the chain and the comparison in front of you first.
The render decides for you.
One local workspace instead of a render button.
One local engine for fast mastering decisions.
Analyze the mix, shape the chain, compare loudness, and export without uploading the track anywhere.
How a session runs. Four moves, one workspace.
Drop the mix once. Everything after that — analysis, chain, comparison, render — happens in the same local window.
Read the mix before you touch it.
SPIRAL decodes the track locally and reports what actually matters for the master: loudness, peaks, dynamics, tone and stereo behaviour.
- LUFS integrated and short-term, against your target.
- True peak and inter-sample clipping, before it reaches the renderer.
- Spectrum, dynamics and stereo correlation in real time.
Shape with restraint, not guesswork.
The chain opens at sensible defaults: HPF, corrective EQ, saturation, compression, tonal EQ, M/S control and brickwall limiting — every module visible and adjustable.
- Curated presets for transparent, punchy or vintage starting points.
- Every move is audible and reversible — nothing hidden behind an auto button.
- The limiter holds the ceiling you set; the assistant explains the rest.
Decide by hearing, not by louder.
Switch between original and mastered at matched loudness. Load a reference track and SPIRAL measures both, so the target is data — not nostalgia.
- A/B switch with level match, so louder never wins by default.
- Loop sections and judge the low end, the vocal or the top separately.
- Reference analysis: LUFS, spectrum and dynamics side by side.
Render WAV locally, at release precision.
When the decisions are made, export the master straight from the browser — 16-bit, 24-bit or 32-bit float. The file never leaves your machine to exist.
- Selected precision, rendered offline for accuracy.
- True-peak safe ceiling you control.
- Drop another track and the next session starts clean.
“Nothing gets exported before the readouts, the chain and the comparison agree. That is the whole method.”
Look inside the studio.
Your mix stays on your machine.
SPIRAL runs on the browser's Web Audio engine. The track is decoded, analysed and rendered locally — no upload, no account, no storage. That is also why monitoring is honest: what you hear is the file you have.
Close the tab and nothing of your music remains anywhere else.
Decisions over knobs. Every move explained.
The defaults are restrained on purpose, and the built-in assistant reads your analysis and reference before it says anything. The goal is a master you can defend in one sentence — not a preset roulette.
Compare, listen, adjust. Nothing is applied behind your back.
Export once. Ship everywhere.
Render the master as WAV at the precision your distribution asks for, with a true-peak safe ceiling. The same session keeps the original for comparison and the analysis for the notes that follow.
Load anything. Export the master.
Six audio formats in, professional WAV out. No plug-in, no installer, no conversion step first.
The everyday reference. Decoded locally in seconds.
The studio format — read, mastered and rendered at precision.
Lossless source, no conversion step.
Apple-friendly mixes load straight from the session.
Open format sources for the archive.
Pick the precision and render offline, true-peak safe.
One session. Everything in the chain.
Nothing hidden, nothing auto-magic. The full signal path is visible from the first readout to the final ceiling.
Free to use. No uploads. No account wall.
SPIRAL runs in your browser using the Web Audio engine. Your track stays on your machine while you analyze, master and export.
Good to know, before you drop a track.
No. The audio is decoded and processed inside your browser with the Web Audio engine. Nothing is uploaded, stored or shared — not even for analysis.
Yes. The engine is free to use and needs no account. There is no export paywall: you can analyze, master and render WAV without paying or signing up.
MP3, WAV, FLAC, AAC, OGG and M4A. The file is decoded locally when you drop it on the engine.
A mastered WAV rendered locally, at 16-bit, 24-bit or 32-bit float precision, with the ceiling you set on the limiter.
Loudness (LUFS), true peak and clipping, dynamics, spectrum, stereo correlation and phase — the six readouts that decide a master before anything is rendered.
It is a fast, honest first pass and a decision workspace: it shows you what the mix needs and renders a solid master locally. For a full release you still decide how far to push it.
No. SPIRAL is the website. A modern browser with Web Audio support is the only requirement.
From the mastering desk.
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