So he went back to New York, formed Steve Reich and Musicians – who, in an early echo of events at the Bloc Festival, performed everywhere from art galleries to discos – humped furniture with Philip Glass and developed his phasing technique. He went to Ghana to study African drumming.
"You could get a cheap ticket if you went to some place in east London and got some ticket that said you were a Nigerian flight engineer," he frowns. "Do I look like a Nigerian flight engineer?" He came back with a case of malaria, and a renewed conviction that he was following the right path.