Flow Builder
Build your set.
Know the chemistry before you play.
Drag tracks into place and every transition gets a chemistry score — harmonic, energy, groove and more — updating live as you reorder. Stop guessing whether two tracks will work together.
Prefer to start from a vibe? Try the AI set builder.
Try the DJ set builder — drag tracks to build your flow
Reorder the tracks below and watch the chemistry scores update in real time. Click a score to see the full breakdown — and see how Pro options on one slot score against both neighbours.
In the app, tap an option to make it the primary — your set becomes decision points, not a fixed list.
Drag tracks to reorder — chemistry scores update in real time
How it works
Start with a track you love
Search for any track in the catalog, or import your Rekordbox library and start from one you already own. Drop it into your first slot — that’s your starting point.
Discover what comes next
Open the next slot and Mixgraph suggests tracks scored by compatibility — not just BPM and key, but energy, texture, mood, and vocal fit. Pick the one that feels right, or search for your own.
Shape the whole set
Drag to reorder, watch chemistry scores update live, and see your energy arc take shape. Every transition is scored so you know it works before you play it.
What you can do
Flow Builder gives you the tools to design sets with intention, not guesswork.
Six-dimension chemistry
Every transition is scored across harmonic compatibility, BPM alignment, energy flow, danceability match, mood consistency, and vocal clash detection. Click any score to see the full breakdown.
Energy arc visualisation
See the energy shape of your entire set as a curve. Spot flat sections, identify peaks, and design deliberate builds and releases across your flow.
Smart suggestions
Open a slot and Mixgraph suggests tracks ranked by compatibility with the surrounding context — not just the previous track, but the overall flow direction.
Plan with optionsPro
Add up to two backup tracks to any slot — each scored against the tracks on either side. Plan your set as decision points, not a fixed list, and pick the one the room calls for in the moment.
AI flow critique
Ask the AI assistant to review your flow. It analyses your energy arc, flags weak transitions, and suggests improvements based on the music theory and your genre.
Build from your own libraryPro
Import your Rekordbox collection once and build flows from the records you actually own. Tracks already in our catalog get the full six-dimension chemistry; tracks we have not analysed yet are still first-class — scored on key + BPM (flagged "BPM + key") so nothing in your crate is off-limits.
Backup track options and building from your own library are Pro — unlock Pro to use them.
Unlock ProPlanning a DJ set
Good DJs plan great sets without tools. Flow Builder makes it faster and gives you more confidence in every transition.
Live Mode
Need real-time suggestions instead?
Flow Builder plans your set in advance. Live Mode is your co-pilot in the booth — set your energy intent and get instant, scored suggestions while you mix.
Questions
What is a DJ set flow?+
A flow is a planned sequence of tracks for a DJ set, ordered to create smooth transitions and a deliberate energy arc. Flow Builder lets you visualise the chemistry between each transition before you play, so you can design sets that take the dancefloor on a journey.
How does chemistry scoring work?+
Every adjacent pair of tracks is scored across six dimensions: harmonic compatibility (Camelot wheel key matching), rhythmic compatibility (BPM closeness), energy flow (smooth transitions vs jarring jumps), groove (kick-and-bass pattern consistency), mood (valence matching), and vocal compatibility (avoiding clashes). These combine into a single chemistry score from 0 to 100.
How is this different from Rekordbox playlists?+
Rekordbox organises your library. Flow Builder plans your set. Where Rekordbox shows you individual track metadata, Flow Builder scores every transition between adjacent tracks, visualises your energy arc across the whole set, and suggests tracks that fit the gaps. It’s the difference between a filing system and a planning tool.
Can I use my own tracks?+
Yes. Flow Builder is free to use with Mixgraph’s catalog of 400,000+ analysed tracks. With Pro you can import your Rekordbox library (an XML export) and build flows from the tracks you actually own, matched or not. Tracks already in our catalog get the full six-dimension chemistry score; tracks we have not analysed yet still work, scored on key + BPM and flagged with a "BPM + key" badge, so you can plan around your whole crate.
Does Flow Builder work on mobile?+
Yes. Flow Builder is fully responsive and works on phones, tablets, and desktop. You can plan sets on your commute and fine-tune them at home.
Is Flow Builder free?+
Yes — Flow Builder is free forever. You get chemistry scoring, up to 5 suggestions per slot, and can save up to 10 flows. Pro unlocks unlimited suggestions, unlimited saved flows, backup options for every slot (so you can plan a set as decision points, not a fixed list), the AI assistant, and natural language set building.
Can I plan a set for a specific gig — warm-up, B2B, festival slot, closing set?+
Flow Builder works the same regardless of the occasion — set your energy intent and the chemistry scoring adapts to whatever tracks and shape you’re building toward. If you want a walkthrough for a specific kind of set, our guides at /learn cover warm-ups, peak-time slots, closing sets, B2Bs, and more.
Ready to plan your next set?
Flow Builder is free forever. Chemistry scoring, energy arc visualisation, and up to 10 saved flows — no credit card required.