Help & Guide

Mix Revision is a mix review platform for music engineers. You upload a bounce, share a link, and your client leaves timestamped notes directly on the waveform. Those notes become a task list you work through. When you're done, you upload a new bounce and repeat.

Mix Revision replaces the cycle of emailing audio files, copying timestamped feedback into a separate list, and losing track of which notes belong to which version.

The core loop:

Mix Revision organizes your work in three levels:

Artists — a client or act you work with. An artist can have multiple projects. Artists with no active projects are hidden from the main list but remain available as a selection when creating new projects.

Projects — an album, EP, single, or any grouping of songs. Projects have their own review link that covers all songs at once. Each project belongs to one artist.

Songs — individual tracks. Each song has its own review link, revision history, waveform, and task list. A song belongs to one project.

There are two ways to upload audio:

Web upload — drag an exported audio file into the drop zone on the project page or song page. Supported formats: WAV, MP3, AIFF, FLAC, MP4. Maximum file size: 500MB in the browser. For larger files, use Relay, which takes up to 2GB. The file is uploaded to your account and a waveform is generated automatically.

Mix Revision Relay — a companion app that watches a folder on your Mac. When you export a bounce from your DAW into the watch folder, Relay detects it and uploads it automatically. See the Relay section below for setup.

To add a new revision to an existing song, open the song page and drop a new exported audio file into the upload zone. Each upload creates a new revision. The most recently uploaded revision becomes the active one shown to clients.

Every song and project has its own review link. The URL stays the same when you upload a new revision. Copy the link once and your client can always return to it for the latest version.

Song review link — shows a single song with its waveform, version info, and a comment form. Best for focused feedback on one track.

Project review link — shows all songs in the project in a playlist. The client can leave notes on individual songs and approve or comment on each one. Best for full-album or EP reviews.

Copy the review link from the top right of any song or project page.

Regenerating a link — if a link went somewhere it shouldn't, open the arrow next to Copy review link and choose Regenerate link. The old link stops working for everyone at once and the new one is copied for you; send it to the people who should still have it. A password stays as it was. A project's link and its songs' links are separate: regenerating one doesn't change the others.

Downloads — clients can't download a mix unless you allow it. On the project page, use the switch in the DOWNLOAD column header to allow every song, or the switch in a song's row for just that song. When a song allows downloads, the review page shows a Download link.

Asking for an email — reviewers must give an email before they send notes. You need it to send them your replies and new versions. To make it optional for one project, set Reviewer email for comments to Optional in the project's settings.

When a client opens a review link, they see a clean, minimal page — no login required. Listening doesn't ask for anything. The first time a client starts a note or approves, the note box asks who they are. They can:

Once submitted, you receive an email with the full note list including timestamps and note text. The notes appear in your task list immediately.

On a project review link, clients can also mark individual songs as approved before submitting.

Comparing versions — if a song has multiple revisions, clients can switch between them directly on the review page using the version selector. This lets them compare the current mix to previous versions before leaving notes. Notes are always submitted against the version the client is currently listening to.

Each note a client submits becomes a task on the song page. Tasks are ordered by timestamp so you can work through them in playback order.

Check off tasks as you address them. Completed tasks move to the resolved section. The task count shown on the artists and project pages reflects open tasks only.

Tasks are tied to a specific revision. When you upload a new bounce, the task list carries over — completed tasks stay completed, open tasks stay open.

Type a reply under any note. Replies save as you type. When you're ready, click Send Review on the song page, or next to Copy review link on the project page to cover every song at once. Each reviewer gets their own email with their notes, your replies, and a link back to the review page. A note you didn't reply to is listed as “no reply”. A reviewer who hasn't heard the current version yet is sent it, even with no new notes.

When a mix is done, mark it as approved. You can do this from:

Both locations show a confirmation before changing the status. Approving a song marks it as done and updates the project status. You can unapprove a song at any time from the same menu, with Mark as needs revision.

A project shows as fully approved when all songs are marked approved.

Uploading a new revision clears the approval: the client approved the previous mix, not this one. If Hold new mixes is on, the approval stays until you send the new version.

Every upload creates a new revision. Revisions are numbered sequentially (v1, v2, v3…) and are permanent — they are not deleted when you upload a new bounce.

The active revision is the one shown to clients on the review link. When you upload a new file, it becomes the active revision — unless you hold it (below).

You can switch the active revision from the song page sidebar — useful if you want to roll back to a previous version. You can also download or delete individual revisions from the same panel.

Turn on Settings → Client review → Hold new mixes until you send them, and new uploads stay private. Your client keeps hearing the current version, and the new one is marked New revision on the song and project pages. Send Review publishes it and emails your reviewers. Set active in the Revisions list publishes it without an email. A song's first upload is never held.

Relay is a macOS menu bar app that watches a folder and automatically uploads new audio files as revisions. It eliminates the manual step of dragging files into the web app.

Download Relay from the Downloads page.

Relay runs in the menu bar. You can switch the active song, change the watch folder, or quit from the menu bar icon.

Relay shows a Dock icon by default. Turn Dock off in Relay's window to keep it in the menu bar only.

Most sessions bounce one song at a time, so the usual setup is a folder per song — point each one at its bounce folder with the folder icon in its row. If instead everything bounces to a single directory, as it tends to on a live show or a whole-record session, you can watch that one folder for the entire project. Set it up from the panel beside the songs on the project page. To stop watching it, click Stop in the same panel.

Relay then decides which song each file belongs to from its filename, ignoring the extension and a trailing version suffix — so Chorus Fix_3.wav, chorus fix v2.wav and Chorus-Fix.wav all land on the same song.

Create songs for new filenames controls what happens when a bounce matches nothing. Leave it on and Relay creates the song for you, named from the file — useful when a record is still growing. Turn it off and unmatched files are listed on the project page instead, with the reason, so nothing is silently invented. Either way the file is recorded; the difference is only whether a song appears for it.

In a project folder, Relay matches a bounce to a song by its filename, ignoring a version marker at the end. Keep the song name the same on every bounce and change only the version.

Neon Tapes.wav → Neon Tapes v2.wav → Neon Tapes v3.wav

Neon_Tapes_v2.wav, Neon Tapes (2).wav, Neon Tapes #2.wav all match Neon Tapes

Changing the name between versions (Neon Tapes.wav then Neon Tapes final.wav) creates a second song — or, with Create songs for new filenames off, lists the file as unmatched.

Re-bouncing the same audio under a new name is skipped — Relay recognizes the file's contents and won't upload a duplicate.

The Mix Revision plugin (AAX, AU, VST3) runs inside your DAW and shows your task list alongside your session. Click a note and your DAW's playhead jumps to that moment. This works in Pro Tools, Reaper, and Logic Pro.

Download the plugin from the Downloads page.

Song Start is the timecode where your bounce begins on the DAW's timeline. The plugin adds it to each note's timestamp, so a note at 1:04 on a song that starts at 01:00:00:00 jumps to 01:01:04:00. Frame Rate tells it how to read that timecode.

While you type, a preview beside the field shows what the value will become. Timecode fills from the frames end, so 130 is one second and thirty frames — and because frames run 00–29 at 30 fps, that rolls to 00:00:02:00. A line under the fields confirms each save and says which DAW it was saved for, or that it was saved for one song only. If a save can't reach the server it says so, and keeps saying so until one succeeds.

Logic doesn't let a plugin move its playhead directly, so the plugin sends it MIDI timecode instead. Logic only follows that timecode with two project settings turned on. The same steps appear in the plugin's settings, under Song Start and Frame Rate. Logic Pro setup (once per project, or save in your template):

If the playhead doesn't move, re-check steps 1 and 2. The first time you click a note in Logic, the plugin shows a reminder with a Set up button that opens these steps.

In Logic, a song with no Song Start yet shows Logic's defaults, 01:00:00:00 at 25 fps. Nothing is saved until you change it. The plugin also adds a MIDI source called Mix Revision, which Logic lists as an input. That's expected.

Archiving hides a project from your active list without deleting any data. All songs, revisions, and audio files are preserved. Archived projects are accessible from the Archive page in the nav.

To archive a project, open the project page and click the ··· menu in the top right, then select Archive project.

You can also archive from the artist page — click Archive in the project row.

To unarchive a project, go to the Archive page and click Unarchive.

Individual songs cannot be archived independently. If you want to hide a song, archive the project it belongs to, or delete the song from the song page.

Mix Revision can automatically archive projects that have had no new uploads after a set number of days. This keeps your active list clean without manual housekeeping.

Set your expiration preference in Settings → Projects → Auto-archive projects. Options are 30, 60, 90, 180 days, or Never (the default).

Expiration is based on the date of the last revision upload to any song in the project. If no new audio has been uploaded within the window, the project is auto-archived at 5am UTC.

Auto-archived projects appear in the Archive page. Archived projects can be unarchived any time while your subscription is active. No audio files are deleted by auto-archiving.

Mix Revision is where mixes get reviewed and approved, not long-term storage. Keep your masters on your own drive.

Deleting a revision — open the song page, find the revision in the sidebar, and click Delete. This permanently removes the audio file from storage and cannot be undone. The song and its other revisions are not affected.

Deleting a song — open the song page and use the ··· settings menu. This deletes the song, all its revisions, and all audio files permanently.

Deleting an artist — open the artist page and use the ··· settings menu. Artists can only be deleted when they have no active projects. Archive or delete all projects first. Deleting an artist removes all associated projects, songs, revisions, and audio files permanently.

Auto-archiving — archiving a project, by hand or automatically, never deletes audio.

When a subscription ends — whether you cancel or it ends after failed payments, your account becomes read-only. Your audio is removed 365 days after the subscription ended, or 90 days after if no payment was ever made on it. We email you 30 days and 7 days before. Your account, projects, songs, notes and history are kept. Resubscribe before the date to keep your audio too.

When a free trial ends without a subscription — your account becomes read-only. The first time you open Mix Revision after the trial ends, a 30-day countdown starts, and we email you 7 days before it ends. Then your audio is deleted, along with your artists, projects, songs, revisions and notes. Your login is kept, so you can subscribe and start again.

Open Settings from the menu on your avatar, top right. Sign out is there too.

API token — used to authenticate both the DAW plugin and Relay. Regenerate this token if you believe it has been compromised. Regenerating invalidates the previous token immediately — you will need to re-enter it in the plugin and Relay.

Rename songs from filename — when enabled, uploading a file renames the song in Mix Revision to match the filename (without the extension). Applies to web uploads and Relay uploads.

Keep version number — every song name made from a filename keeps the trailing take number (“Vignette AH_6”, not “Vignette AH”), including a new song a project folder creates. Relay still matches every take to the same song. A name you typed yourself is never overwritten.

Hold new mixes until you send them — see Revisions above.

Auto-archive projects — see the Project expiration section above.

Billing — see your plan, cancel, and update your card or download invoices from Settings → Billing.