Library that keeps up
Incremental scans, search, filters, folders and saved views for tens of thousands of tracks. A moved file, or a whole folder on a new drive, keeps its history.
For DJs of every style
Your library,
ready for the booth.
Cueflow scans your music, analyses BPM, key, beatgrid and structure on your Mac, places your hot cues, builds your sets and hands everything to Rekordbox. Your files are never modified.
Apple Silicon · macOS 15 or later · runs fully offline
Search artist, title, label…
AllTech HouseHouseUK GarageMinimal
| Track | Genre | BPM | Key | Time |
|---|---|---|---|---|
| Night ShiftDemo Artist | Tech House | 128 | 8A | 6:12 |
| Warehouse LightsSample Collective | House | 124 | 9A | 5:47 |
| SouthbankTwo Step Unit | UK Garage | 132 | 4B | 4:58 |
| Low TideMinimal Club | Minimal | 126 | 11A | 7:03 |
ABCDG
100 %local, no cloud
0tags rewritten
A → Ghot cues placed for you
XMLto Rekordbox, on your click
Features
Everything between your music folder and the booth.
Audio analysis
BPM from the audio, beatgrid and bar 1, key, per-bar energy and structure: intro, groove, break, build, drop, outro.
Hot cues, placed
A Start, B Groove, C Break, D Drop, F Drop 2, G Outro, snapped to the grid. Move, rename or lock any of them in the editor.
Player & waveforms
A player that follows you across the app, colour waveforms and keyboard shortcuts. Match playing lists what mixes with the current track.
Accuracy
Measured, not promised.
Every version of the analysis is measured on 272 tracks whose Rekordbox grids and keys were set and corrected by hand by a working DJ, and its results are published, version by version.
100%
BPM rightBPM juste
272 reference tracks · in 0.1.0: 100 %272 morceaux de référence · en 0.1.0 : 100 %
93%
Grid on the beatGrille sur le temps
within 15 ms · 93.4 % · in 0.1.0: 93.4 %à 15 ms près · 93,4 % · en 0.1.0 : 93,4 %
94%
Bar 1 in the right placePremière mesure au bon endroit
94.1 % · in 0.1.0: 87.5 % · one click to move it94,1 % · en 0.1.0 : 87,5 % · un clic pour la déplacer
70%
Key exactTonalité exacte
76.6 % counting fifth and relative keys · in 0.1.0: 69.9 %76,6 % en comptant quintes et relatives · en 0.1.0 : 69,9 %
- 97 % BPM, 78 % key on 200 tracks taken across a whole library, never used to tune anything97 % de BPM, 78 % de tonalités sur 200 morceaux pris dans toute une bibliothèque, jamais utilisés pour régler quoi que ce soit
- ~13 s per track on Apple Silicon, in the background, on your Mac~13 s par morceau sur Apple Silicon, en arrière-plan, sur ton Mac
- 0 bytes uploaded: analysis runs offline0 octet envoyé : l'analyse tourne hors ligne
Reference: the DJ's own Rekordbox grids and keys (house, tech house, afro house; mostly WAV). Your library may differ: Corrections shows every track where Cueflow and Rekordbox disagree.
Tools
One tool for every step, from sorting to posting.
Genre Review
Every track gets its genre.
Cueflow suggests a genre for every track from your folder names, in your own words. You review them fast, from the keyboard, and nothing changes until you approve.
- Your genres, your words02_GENRES/HOUSE/TECH_HOUSE becomes Tech House. Enter approves, R rejects, or type any genre for tracks outside your genre folders.
- Undo anytimeApproved and rejected tracks stay listed: change your mind and the catalogue follows.
- Sorted into foldersOne click copies approved tracks into CUEFLOW/GENRES/<genre>. Copies only: your originals never move.
To review2 387↵ approve · 1–4 pick · R reject
Warehouse LightsSample Collective · 124 BPM · 9A
02_GENRES/HOUSE/TECH_HOUSE- 1Tech Housefolder
CUEFLOW / GENRES /Tech House 128House 96UK Garage 41Afro House +1
PlaylistsNew
Playlists that keep up.
Build your crates by hand, or describe them once and let Cueflow fill them. Either way, they end up in Rekordbox.
- Drag, drop, reorderDrop tracks on a playlist in the sidebar, then drag the rows into the order you will play them.
- Smart playlistsSave any filter (genre, BPM, key, rating, folder) as a playlist: new matching tracks join it by themselves.
- In Rekordbox, as isEvery playlist is written to the Rekordbox XML under Cueflow → Playlists, in your order.
Playlists
≡Friday warm-up 18 ≡Sunday closing 12 ✦Peak time 42 ✦Tech House 124–128 57Smart playlist · rules
Genre Tech HouseBPM 124–128Rating ★ 4+
57 tracks · kept up to date after every scan
Night ShiftDemo Artist128
Low TideMinimal Club126
Warehouse LightsSample Collective124
Audio editor
An editor made for DJ edits.
Shorten an intro, loop a groove, fix a grid: every change is non-destructive and exported as a new file, never over the original.
- Cut, fade, gainCut, copy, paste, trim, split, fades, gain and normalize, with undo, redo and A/B listening.
- Grids, cues and loopsVariable beatgrid, bar 1 and tap tempo; hot cues, memory cues, loops and sections snapped to the beat.
- Edits join your libraryAn exported edit becomes a track of its own, with its grid, cues and notes, and its own playlist in Rekordbox.
EditBeatgridCuesLoopsSectionsNotes
CutCopyPasteFade inFade outGainNormalize↶ ↷A/B
ABCD
Cut · 8 bars
Loop 16
IntroGrooveBreakDropOutro
New file · original untouched
↗ Warm-up
124 → 128 BPM · 6 tracks · harmonic
- 1Night DriveDemo Artist1248AStart
- 2Warehouse LightsSample Collective1249A0.0% BPM±1 key
- 3Low TideMinimal Club1259A+0.8% BPMsame key
- 4Southbank GrooveTwo Step Unit12610A+0.8% BPM±1 key
- 5Peak HourLate Room12710B+0.8% BPMrelative
- 6Sunrise ToolBasement Crew12811B+0.8% BPM±1 key
Set BuilderNew
From one track to a whole set.
Pick the track you open with, the energy you want (warm-up, peak, steady, cool-down) and the BPM path. Cueflow proposes the order, and tells you why each track follows the last one.
- Harmonic by defaultSame key, one step around the Camelot wheel or the relative key; a clash only when nothing else fits, and it says so.
- BPM and energy in shapeSmall tempo steps along your path, and the energy measured in your tracks following the curve you chose.
- You have the last wordLock the tracks you love, exclude the others, find another track for any spot, then rebuild around your choices.
- Straight into RekordboxSave the set as a playlist, in order: it appears in the Rekordbox XML with its cues and grids.
Set Clips
From a two-hour set to ready-to-post clips.
Import the video of your set. Cueflow listens to it, finds the build-ups and the drops, and cuts clips on the bar, never longer than 60 seconds. Trim them on the timeline, export them vertical, post them.
- Drops found for youThe bass coming back after a breakdown, build-ups, transitions and peaks, detected from the sound.
- Cut on the barEvery clip starts and ends on a bar line, so the loop feels right on the first play.
- 9:16 in one clickVertical crop or blurred background, exported with VideoToolbox on your Mac.
- Captions & calendarOne-line captions with hashtags and the track playing, recognised from your library. Plan your posts.
Friday_Warehouse_Set.mp4
1:58:24
Drop
Build-up
Drop
0:000:301:001:301:58
Drop · 0:34
Build-up · 0:28
Drop · 0:41
Rekordbox
Rekordbox, without the risk.
Cueflow never opens your Rekordbox database. It reads the collection XML you export, and writes one you import, on your click.
- A live XMLHot cues, memory cues, loops, beatgrids, playlists and folders, rewritten after every analysis at one fixed path.
- Your grid comes firstImport your collection: ratings and missing BPM, key and genre come in, and your Rekordbox grid and cues are kept on export.
- Import is your clickPoint Rekordbox at the XML once, then import tracks or playlists when you choose.
Cueflow
XMLcueflow.xml
rekordbox
← collection.xml · read-only import
Export
- Hot cues A → G
- Memory cues & loops
- Beatgrids
- Playlists & folders
Import
- Ratings
- Missing BPM, key, genre
- Your grid, kept
- Your cues, kept
Rekordbox database: never opened.
CorrectionsNew
Catch the wrong grids before the booth.
Cueflow compares its analysis with the grids in your Rekordbox and the BPM and key in your tags, and lists every track where they disagree.
- Half a beat off, double tempo, wrong bar 1Each disagreement says what is wrong and by how much: +231 ms, 64 → 128 BPM, 8A → 9A.
- Use Cueflow, or keep yoursOne key per track, or a whole folder at once. Every choice can be undone, and a kept value only comes back if it changes.
- Fixed in Rekordbox at the next importAn accepted grid replaces the old one in the XML, and your cues follow it. Your files and your Rekordbox database are never touched.
To check3↵ use Cueflow · R keep · U undo
Warehouse Lights02_GENRES/HOUSE/TECH_HOUSE
GRID½ beat offRekordbox +231 ms → on the kickNight Drive02_GENRES/HOUSE/DEEP_HOUSE
BPM×264.00 → 128.00Lagos Sunset02_GENRES/HOUSE/AFRO_HOUSE
KEYtag ≠ audio8A → 9AUndo anytime
Cleanup
A tidy library, nothing lost.
Find the copies and the forgotten scraps, choose what goes, and everything leaves through the macOS Trash.
- Identical duplicatesSame content, byte for byte: grouped by fingerprint, you keep the copy you want.
- Probable duplicatesSame artist, title and length in another format or bitrate, side by side, never removed automatically.
- Short filesUnder 15, 30, 60, 90 or 120 s, with tools, vocals and samples folders protected.
Identical duplicates3 copies
02_GENRES/Tech House/Warehouse Lights.mp3Keep
Downloads/Warehouse Lights.mp3Trash
Downloads/Warehouse Lights (1).mp3Trash
Recoverable from the Trash
Short files
15 s30 s60 s90 s120 s
23 files · TOOLS, VOCALS, SAMPLES protectedHow it works
Five steps, you stay in control.
- 1
Scan
Point Cueflow at your music folder. Tags are read, never written.
- 2
Analyse
BPM, key, grid and structure, computed on your Mac.
- 3
Review
Compare tags with the analysis, approve genres and sort them into folders.
- 4
Prepare
Adjust grids and cues, build sets and playlists, make edits and clips.
- 5
Export
Rekordbox reads the XML. The final import is your click.
Principles
Analyse intelligently.
Suggest clearly.
Let the DJ decide.
- Your files stay yours. No tag, no audio, no file name is ever rewritten. Cleanup only moves files to the Trash.
- Local first. The catalogue, the analysis and the models run on your Mac. Nothing is uploaded.
- Suggestions, not decisions. Genres wait for your approval, sets wait for your edits, your locked cues are never replaced.
- Rekordbox stays untouched. Everything goes through XML, imported when you choose.
What's next
Coming in the next versions.
Coming soon
Cueflow for macOS is in its final steps: signing and notarization by Apple. It will be available here.
Apple Silicon · macOS 15 or later · runs fully offline
FAQ
Questions
Does Cueflow modify my music files?
No. Tags, audio and file names are only read. Edits are exported as new files, sorting by genre makes copies, and cleanup moves files to the Trash after you confirm.
Where is my data?
In ~/Library/Application Support/Cueflow: the database, clips, edits and backups. Your music stays where it is.
What if I move my music folder?
Choose its new location in Settings and rescan: each file is recognised by its content, so cues, grids, notes and ratings follow.
Does the Set Builder use AI?
No. It follows rules you can read: Camelot key relations, BPM steps and the energy measured in your tracks. Every transition shows why it was chosen, and nothing is saved until you make it a playlist.
Does it need the internet?
No. Analysis models ship with the app; nothing is sent anywhere.
Does it change my Rekordbox library?
Never directly. Cueflow writes an XML file; Rekordbox imports it when you ask it to.
Social Media
Post your clips, on schedule.
Every exported clip gets ready-to-paste drafts for Instagram and TikTok, and a calendar to spread your posts over the week. You publish: Cueflow never logs into your accounts.
Warehouse at 2 am, the drop hit 🔥
#techhouse #djset #warehouse
♪ Warehouse Lights — Sample Collectiverecognised