A mix to run to

Pick a cadence and how long you will be out. Every beat in the whole mix lands on that tempo — it never drifts, so your feet never have to. It is made here in your browser; nothing uploads.

Cadence

Or exactly BPM

Steps per minute, not a taste in music. Most runners land between 160 and 180; count your steps for fifteen seconds and multiply by four.

How long

And each song:

On a phone, pick shorter songs before you pick a shorter mix. It is built one song at a time, so it is the song length that decides how much your device has to hold — an hour of three‑minute songs asks less of it than a quarter of an hour of five‑minute ones.

This mix

Number

The same number always makes the same mix, so a good one is worth writing down. The link in your address bar carries it.

How it picks

It draws from that were measured rather than chosen by ear. Every track in the studio with a kit in it was rendered at running tempo and scored on how far its loudness drops between one beat and the next — which is the part you feel rather than hear. Four‑to‑the‑floor styles scored 15–32 dB; breakbeat styles managed 5–9, because a syncopated kick is a weaker pulse however loudly it is mixed. Only the first group is in here.

No two songs in a row come from the same engine, and every song is levelled to the same loudness, so nothing arrives quiet in a pair of earbuds halfway round.

Want a say in how it sounds? The mix desk has these same six engines with faders and macros on them — shape one track, then build the whole mix with those settings. For all twenty‑four engines, the pads and the sound effects, there is the studio.