Mastering review & approval software, built for engineers
Most "audio review" tools are video platforms with a waveform bolted on, or file-sharing links with no workflow at all. Soneam is built for the job mixing and mastering engineers actually do: get a master heard correctly, get feedback, get sign-off, and deliver safely, all from one link.
Why audio review needs its own tool
Reviewing a master isn't reviewing a video, and it isn't sending a Dropbox folder. Three things matter specifically to audio, and Soneam is built around them:
What's approved should be verifiable. A client approving an MP3 isn't approving the master. Soneam plays a lossless FLAC preview and ties each approval to a SHA-256 checksum, so the file that was signed off is provably byte-identical to the file you uploaded and the file you later deliver.
Loudness context decides the master. The same master sounds different after Spotify or Apple normalizes it. Soneam plays it back the way each platform will, inside the review, so the loudness conversation happens before sign-off rather than after release. See how platform loudness works →
Feedback belongs on the waveform. "The 2:14 cymbal is harsh" should be a pin on the timeline, carried forward when you upload a revision, instead of a line buried in an email thread.
The workflow, end to end
- Share. Send one link. The client opens it in any browser, no account needed.
- Review. Lossless playback, a per-platform streaming loudness preview, and comments pinned to the waveform that carry across versions.
- Approve. The client signs off without an account. Every approval is logged with name, email, timestamp, the exact version and its checksum, and a receipt goes to both sides.
- Deliver. Hand over the master through a password-protected, expiring, revocable link with download tracking, rather than an open Dropbox folder.
How Soneam compares
Audio-first review tools already do lossless playback, waveform comments and client approval well. Soneam's difference is in what happens around the approval, namely provable file integrity and loudness context, and in delivery.
| Capability | File-sharing links | Video-first tools | Audio-first tools | Soneam |
|---|---|---|---|---|
| Lossless playback in-browser | No | No | Yes | Yes (FLAC) |
| Waveform comments, carried across versions | No | Partial | Varies | Yes |
| Login-free client approval | No | Rarely | Often | Yes |
| Password-protected, expiring & revocable delivery | Partial | Partial | Some | Yes + tracking |
| Per-platform streaming loudness preview | No | No | Rare | Yes |
| Checksum-verified approval (SHA-256) | No | No | No | Yes |
The last two rows are the wedge: hearing the master as each platform will normalize it before sign-off, and an approval record that cryptographically pins the exact file. Everything above them, good audio-first tools also do, and Soneam brings the whole job into one link.
Compared as of July 2026. Competing categories evolve quickly; capabilities above describe typical offerings in each category and are verified against current vendor documentation.
Privacy & trust
Unreleased masters are treated as confidential. Your audio is never used to train AI. Delivery links can be revoked at any time, and download activity is tracked so you know what reached whom.
Who it's for
Mixing and mastering engineers, project studios, and producers who deliver to clients: anyone currently stitching together Dropbox, email and lossy bounces, and wanting one link that handles review, sign-off and delivery without dropping fidelity along the way.
Free to start, scales by storage
Soneam is free for your first projects and scales by storage, not seats. Add as many clients and collaborators as you like; what you pay tracks the size of the catalog you keep, regardless of how many people you invite. See full pricing →
Frequently asked questions
Do my clients need an account to review or approve?
No. Clients open one link in any browser, listen, comment on the waveform, and sign off with no account or app. The approval is still recorded with name, email, timestamp, the exact version and its checksum.
What does the SHA-256 checksum prove?
File integrity: the approved master is byte-identical to the file you uploaded and the file you deliver. It guarantees nobody approved one file and received another. It is separate from playback fidelity, which is handled by lossless FLAC playback.
Why does Soneam include a streaming loudness preview?
Streaming services normalize playback loudness, so a master can sound different after release than in review. Soneam plays the master back the way each platform will, so loudness is agreed before sign-off.
Is my unreleased music safe?
Yes. Unreleased masters are confidential, delivery links are password-protected and revocable, downloads are tracked, and your audio is never used to train AI.
How is Soneam different from Filepass, Highnote or Aliada?
Those audio-first tools cover lossless playback, waveform comments and client approval. Soneam adds a per-platform streaming loudness preview inside the review and a checksum-verified approval that pins the exact approved file, plus expiring, revocable delivery with download tracking.
Is the approval legally binding like an e-signature?
Soneam records a clear, timestamped approval with identity, version and checksum, which is strong evidence of sign-off. It is not a substitute for a formal e-signature platform if a contract or jurisdiction requires one.
Get sign-off without the back-and-forth
Soneam turns a master into a shareable review link. Your client hears a lossless preview at streaming loudness, leaves feedback pinned to the waveform, and approves, with no account, no MP3, and no expired Dropbox link.