Dancers naturally move to a 'tempo octave' — doubling or halving the stated BPM in their body response

Just as musical pitch operates in octaves (doubling frequency), tempo perception operates in tempo octaves: dancers instinctively find and move to a natural subdivision or multiple of the stated BPM. At 70 BPM, most dancers will move at 140 BPM (double). At 160 BPM, some will feel the 80 BPM half-time. This means that the stated tempo of a track may be a less reliable guide to how it feels than its relationship to the body’s natural movement rates. A DJ playing ‘slow’ music at 70 BPM may actually be giving the crowd an implicit 140 BPM experience. This reframes ‘slow’ and ‘fast’ as relative to which octave the dancer anchors to, not the absolute BPM.

Examples

Kampire: ‘If you’re playing at 70, most people are moving to the double tempo anyway — so you are in effect giving them 140. It’s a tempo octave, if you like.‘

Assessment

If a DJ plays a 75 BPM track and most dancers are moving at 150 BPM, what does this suggest about how to think about ‘slow’ music sets? Give one implication for how you would build a set that feels energetic at a stated 80 BPM.