Beatmatching

Beatmatching is syncing the pulse of two tracks: getting one's beats to land exactly on the other's, so they can overlap without sounding like two pieces of music arguing. It is the foundational mixing skill.

By hand it is done with the pitch fader and the platter: adjust the speed until the tempos agree, then nudge or brake to align the phase. With sync, the software does it from the beat grid it analysed.

The argument about whether to use sync is settled in practice and not worth reopening here. What is worth saying is what sync does not solve, because it is a common confusion: it aligns the pulse, not the structure. Two perfectly synced tracks can be half a block out of step and still sound wrong — that is phrasing, and it stays yours.

It does not solve key either, and it does not decide which track comes next. Which is why preparing a set is a different job from mixing it well: you can have impeccable technique over an order that goes nowhere, and the room hears the whole thing, not the transition.