The composer still making music four years after his death – thanks to an artificial brain

In Australia, a team of artists and scientists have resurrected the US composer Alvin Lucier. It raises a storm of questions about AI and authorship - and it's also incredibly beautiful

In a darkened room, a fractured symphony of rattles, hums and warbles bounces off the walls - like an orchestra tuning up in some parallel universe. But there's not a musician in sight.

If you look closely there is a small fragment of a performer. Albeit one without a pulse.