Horns punch the air, a drum machine grins, and Whitney Houston's voice arrives already at full size, asking for a partner as if the whole room had been invited to answer.
A synth bass hops like a nervous heartbeat, too fast for a ballad and too human for a machine, and Alison Moyet's voice comes in already bargaining, don't go, as if the chorus were a hand on a sleeve.
A twelve-string guitar states four bars that glitter and then hold, compressed until the note seems to ring in the air of the radio itself, and only then do the voices come in.
A bass guitar enters already angry, sliding, and Alanis Morissette's voice follows it without warming up, mid-sentence, as if the listener had walked into a phone call that should have stayed private.
The groove arrives already smiling, a bass that rolls rather than stabs, a guitar that comments from the side, a chorus that sounds like a pledge written by people who have just got off a bus.