Feel & analysis
Percussive ratio
A percussive track is mostly hits — drums, stabs, short sounds — where a sustained one leans on pads and held chords. It is the difference between a record that fills a gap and one that fills the space.
In practice
Pair a percussive record with a sustained one and they layer. Pair two sustained ones and they crowd.
Reach for this when a blend is technically clean and still sounds busy: check whether both records are carrying sustained content, and if they are, either strip one to its drums or accept it is a short mix rather than a long one. In selection it is a genuinely useful sort — keeping a handful of heavily percussive records to hand gives you something that layers over almost anything, which is what gets you out of trouble when two tracks you wanted to pair simply will not go together.
Hits
What percussive means
Pads + chords
What sustained means
One of each
The pairing that layers
Where these come from: How the two kinds of record behave together — practice, not a setting. Our analyser scores this from 0 to 1 with a median of 0.44, and it is the widest-spread dimension it reads. It is still too coarse to pick records with, so treat it as a way of listening rather than a filter. For what we can measure, see the move it predicts.
Why it matters
This is the single best predictor of whether two records will layer. A percussive track and a sustained one live in different parts of the arrangement, so they sit on top of each other cleanly; two sustained records are both trying to hold the same space and the result is crowded no matter how well matched they are.
It also tells you what a record is for. Something heavily percussive is a tool — run it underneath, use it to extend a section, bridge two tracks that do not otherwise meet. Something heavily sustained is the record everyone came to hear, and there is nowhere to hide it.
Frequently asked
Which tracks layer well?+
One percussive and one sustained. They occupy different parts of the arrangement, so neither is fighting the other for the same space.
Why does my blend sound busy even though it is in key?+
Usually because both records are sustained. Strip one to its drums, or accept that it is a short mix rather than a long one.
Is a percussive track the same as a DJ tool?+
Most tools are heavily percussive, which is what makes them mix with anything. Not every percussive record is a tool — plenty are full records that happen to lead with their drums.
Related terms
Layering
Layering plays two records together for an extended period as a deliberate combination rather than as a transition — a loop under a track, a percussion record over a groove, an acapella over an instrumental.
DJ tool
A DJ tool is a track built for mixing rather than listening — long, loopable, mostly percussive, with little melody or arrangement. It exists to bridge, extend and hold, not to be the record anyone remembers.
Pad
A pad is a sustained, slow-moving sound — usually a synth or strings — that fills the background and holds the harmony. This is the musical sense; the rubber squares on a controller are performance pads.
Transient
A transient is the short burst of energy at the start of a sound — the click of a kick, the snap of a snare. It is what makes percussion readable and what beat detection listens for.
Explore: Spectrogram analyzer · Layering · DJ tool · All DJ terms