PETER ASHER Coaxing the best work from pop’s most amazing voices By Jeff Tamarkin When he and singing partner Gordon Waller began enjoying hits in the 1960s as Peter and Gordon, London-born Peter Asher made the most of his opportunity. In the recording studio, Asher kept a close eye on the steps that producers Norman Newell and John Burgess took to make now-classics like “A World Without Love” and “Nobody I Know” sound the way they did....