Still sending masters over expiring Dropbox links and chasing feedback in email threads? There's a platform built for the way you deliver.
The workflow
From master to sign-off,
in one link.
One link — no accounts
Clients open the review in any browser. Nothing to install, no sign-up — the friction that kills feedback is gone.
Notes that carry across versions
Still-open feedback follows the work into v2, v3 — so a fix is checked against the exact note that asked for it.
A record of every approval
Who signed off on which version, timestamped — sign-off you can point to when the release goes out.
Streaming preview
Hear the master
the way the world will.
Every platform normalizes loudness differently — Spotify, Apple Music, Tidal and Amazon turn a quiet master up into a limiter, YouTube only turns loud ones down, and some leave it untouched. Soneam reproduces each on playback, so you and your client hear exactly what ships — and see the peaks that get crushed.
Hear the difference →
Thugs — Master
48 kHz · 24-bit · −16.0 LUFS
Pick a platform — watch loudness normalization reshape this master, live. Red = limited at −1 dBTP.
- ✓ Spotify, Apple Music, YouTube, Amazon & Tidal targets
- ✓ −1 dBTP true-peak warning on encode-unsafe masters
- ✓ Switch targets live during playback — no re-render
As delivered to
Both played at the same loudness — judge the master, not the volume.
Fair Loudness
Don't get fooled
by loudness.
Louder always sounds “better” for a second — that's how revisions get approved for the wrong reason. Flip on Fair Loudness and switching versions plays them level-matched — attenuated to the quieter one, so nothing clips and you hear the master, not the volume.
- ✓ The version pills are the A/B — same position, playback never stops
- ✓ Attenuate-only matching — never boosts, never clips, never re-encodes
- ✓ On the engineer screen and the client review link
Built for the deliverable
The details
mastering engineers care about.
Feedback pinned to the waveform
Point or range comments land on the exact bar — with replies in a thread — and carry across versions, so a fix is always checked against the note that asked for it.
Mastering-grade loudness, every version
Integrated LUFS, true-peak, sample peak, range, dynamic range and PLR/PSR — plus a loudness-over-time curve drawn right on the waveform. Measured automatically; the numbers you sign off on.
Verifiable bit-perfect
Lossless FLAC playback — and every delivery carries a SHA-256 checksum your client can verify against the master.
checksum · delivery ≡ master
No-login client review
Your clients just click the link — desktop or phone. No account, no app.
Protected delivery
The original stays safe — and a signed approval stays on record.
Who it's for
Starts with mastering.
Works for the whole chain.
Built first for mastering engineers — where bit-perfect and loudness matter most — and just as at home for mixing and music production.
Pricing
One toolset. Pick your scale.
Every plan includes every feature — plans differ only by how many projects and how much storage you get. No feature paywalls.
In every plan — including Free
No credit card to start · Cancel or switch anytime · Masters never used to train AI · Prices in USD
Questions, answered
Everything engineers ask before their first review link.
Do my clients need an account to review or approve?
No. You send a link; your client plays the master, leaves feedback pinned to the waveform, and approves — all without signing up or installing anything.
Is the playback actually lossless?
Yes. Soneam streams a lossless FLAC preview of your master, and ties each approval to a SHA-256 checksum that proves the file is byte-identical to the one you uploaded — no MP3, no re-encode.
What does the streaming loudness preview do?
It plays your master the way Spotify, Apple Music, YouTube, Tidal, and Amazon will after their loudness normalization, so you and your client hear the real delivered level before sign-off — not just the studio level. Try the free loudness tool →
Will my masters be used to train AI?
Never. We do not use your audio to train AI models and we do not sell it. Unreleased masters are treated as confidential.
Is client approval recorded?
Yes. Every approval is logged with the reviewer's name, email, timestamp, the exact version, and its SHA-256 checksum, and a receipt is emailed to both sides — a clear record of who signed off on which master.
How are final deliveries protected?
Delivery links are password-protected and can expire, downloads are tracked, and you can revoke access at any time — so original masters are not sitting in an open Dropbox folder.