Track structure
Intro
The intro is the stretch at the start of a track built for mixing — usually drums and little else, running a fixed number of bars so an incoming record can be beatmatched and blended before anything melodic arrives.
Measured in our catalog
On all 63 records we hold as both an extended mix and a radio edit, the extended cut is the longer one — by a median of 48 seconds, which at 128 BPM is 25.6 bars.
That gap is the closest the catalog comes to measuring a section of a track, because it is the only comparison that holds the music constant: same artist, same record, two cuts. Nothing tells us how the 48 seconds divides between the two ends — if it split evenly that would be about sixteen bars at each, which is the shape a DJ intro usually takes.
63
Records held as both
+48s
Median extra length
25.6
Bars at 128 BPM
63/63
Extended cut longer
| Cut | Median length |
|---|---|
| Extended mix | 4:31 |
| Radio edit | 3:31 |
| The difference | 48s |
Measured on 11 August 2026 across the 63 public records released as both an extended mix and a radio edit, matched on artist and on title with the version suffix removed.
Why it matters
The intro is the room you get to work in. Everything a DJ does at the point of a transition — matching, phrasing, swapping the bass over, riding the EQ — happens inside it, and a record with sixteen bars of drums at the front is a fundamentally easier record to play than the same music with the hook starting at zero.
It is the single biggest reason the extended mix exists, and the reason a radio edit is awkward to mix even when it is the better piece of music.
Frequently asked
How long is a DJ intro?+
Usually sixteen or thirty-two bars. Across the 63 records we hold in both cuts, the extended version runs a median of 48 seconds longer than the radio edit, and that time is the intro and outro together.
Why do extended mixes have longer intros?+
Because they are made for DJs rather than for radio. The extra bars at each end are working room — somewhere to beatmatch, phrase and swap the low end over before the record properly starts.
Can you mix a radio edit?+
You can, but you have less to work with. A radio edit reaches its hook almost immediately, so the blend has to be shorter and more decisive, and there is rarely a clean drum-only passage to hide the transition in.
Related terms
Outro
The outro is the stretch at the end of a track built for mixing out — the arrangement thinned back towards drums so the next record can come up underneath it without two vocals or two basslines colliding.
Extended mix
An extended mix is the DJ cut of a release — a longer intro and outro with more bars of beats at each end, so there is room to mix in and out. It is the version that belongs in a set.
Radio edit
A radio edit is a shortened version cut for airplay — usually under four minutes, with the long intro and outro removed and the arrangement tightened. It is the version that gives a DJ the least to work with.
Phrase
A phrase is a block of bars a track is built from, usually 8, 16 or 32. Electronic music changes at phrase boundaries, so a mix that starts on one keeps both tracks structurally in step.
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