SonodexWhat the number is for
A set is more than a list of matching tracks. It has a shape: calm start, build-up, peak, cool-down. The energy level helps you plan this curve without having every track in your head. It also shows you why two harmonically matching tracks in a row do not work: the second is clearly weaker.
How energy is determined
Tools calculate it from properties such as loudness, frequency density, rhythm and the build of tension. The result is an estimate, not a law of nature, and it differs between programs. Do not rely on it blindly, but combine it with your impression of the track.
Rule of thumb: warm-up tracks sit at 3 to 5, peak time at 7 to 9. Rises of one or two steps per track sound natural; use big jumps deliberately.
Plan energy in the set
Sketch the curve beforehand: low start, slow rise, peak in the middle or towards the end, then a short descent. From the warm-up set to the closing, each phase has its range. See also Building a set.
In practice: matching energy and feel
Rate a few tracks yourself before you trust the software. Where it differs, you get a feel for how it calculates. A track with lots of bass but little movement can rank high on paper and still feel calm on the floor.
So use the number as a filter and as a guide, not as a law. Combined with key and tempo you get a solid pre-selection.
Related terms
Frequently asked questions
Is the energy level the same everywhere?
No. Every piece of software calculates differently, so values are not directly comparable. Within your library, stick to one method.
Should I sort by energy?
As a filter yes, as an order no. A set lives on contrast.