Free tool

What plays next?

Search any track and see what DJs actually played after it — with the number of published sets behind every pairing. Not what theory says should work. What the field already does.

Short answer. There are two ways to answer "what mixes with this?" Theory says compatible keys and a tempo inside your pitch fader. Evidence says what DJs have already played, and it does not always agree. This tool shows the second — each result carries the number of published sets where that record followed yours.

Two answers to the same question

Almost every DJ tool answers "what mixes with this?" from theory: take the key, take the BPM, return everything compatible. That is useful and it is also the reason so many AI-planned sets sound the same — a filter that accepts everything harmonically adjacent has no opinion about which of those records anybody would actually want to hear next.

Evidence is a different question. Across a corpus of more than 70,000 published DJ sets, every pair of consecutive records is a decision a working DJ made in front of a room. Counting those decisions gives you something theory cannot: a ranking of what people chose, not a list of what was permitted.

The two disagree more often than you would expect, and the disagreements are the interesting part. Only 22% of real transitions are Camelot-compatible at all — against 16.7% by chance — so most of what DJs play would be rejected by a strict harmonic filter. The tool marks key and tempo compatibility on each result rather than filtering by it, so you can see which pairings are easy and which ones somebody made work.

What the set count means

Each result carries the number of distinct published sets in which that record followed yours. It counts sets rather than plays deliberately: one DJ repeating a favourite transition every week across a residency should not outweigh five different DJs arriving at the same idea independently.

Evidence	How to read it
2 sets	A coincidence worth noticing. Someone thought of it twice.
3–9 sets	A real pairing. Several DJs found it separately.
10+ sets	A settled move — often a label pairing, a well-known intro, or a transition that has become part of how the record is played.

High counts cluster around records with an obvious structural fit: a long percussive outro into a long percussive intro, a famous acapella that lands over half the genre, or two tracks released together and promoted as a pair.

What this is not

It is not a recommendation engine. It reports what happened. A move appearing in twenty sets tells you it works in a room; it does not tell you it works in your room, at your slot, for your crowd.
It is not complete. The corpus covers tracks that appear in published tracklists, so coverage is best for club-oriented electronic music of the last few years and thin for new releases, edits and everything played outside the documented circuit.
It is not a key checker. The compatibility badges use catalogue metadata, and key detection is often wrong — two tools regularly disagree about the same file. Treat a badge as evidence, not truth.

How to use it in practice

Start from a record you know lands. The tool is most useful pointed at your anchors — the opener you always use, the peak record you built the set around.
Look for the pairings you did not expect. The obvious ones you already know. A high count on a record you would never have tried is the reason to run the search.
Check the badges second, not first. If a well-evidenced pairing is marked key-incompatible, that is a prompt to listen rather than a reason to skip — plenty of great transitions ignore key entirely.
Take it to the Lab. Evidence tells you two records go together; it does not tell you where to bring the fader in. That part still needs your ears.

FAQ

How do you know what mixes with a track?

Two different ways, and they answer different questions. Theory asks whether two records are compatible on paper — Camelot key, tempo inside a pitch fader's range, phrasing that lines up. Evidence asks what DJs have actually played, which is what this tool shows: each pairing carries the number of published sets in which one record followed the other.

What does the set count next to each track mean?

It is the number of distinct published DJ sets in which that record was played immediately after the one you searched. Two sets is a coincidence worth noticing; ten or more is a pairing the field has settled on. It counts sets, not plays, so one DJ repeating a favourite transition across a residency does not inflate it.

Why is my track not in the corpus?

The corpus is built from published tracklists, so it covers records that appear in sets DJs have documented. New releases, unreleased edits, and tracks played mostly outside the documented circuit will be missing or thin. Coverage is best for club-oriented electronic music from the last few years.

Does mixing in key actually matter? · Camelot wheel · BPM transition calculator · Six transition types