After a second EP (Pragmatic Songs), Roger-Marc got in touch with Jean-Jacques Burnel, who offered to produce the next single, Nagasaki Mon Amour.
It also includes the band new single, Walking Class Hero, as well as several guest musicians, like Daniel B (Front 242) and Dave Greenfield (The Stranglers).
In 1987, Polyphonic Size played in Moscow, Irkutsk and Beijing, as part of a cultural exchange between Belgium, USSR and China, turning the Trans-Siberian train into an artistic residence.
On 6 April 1989 they appeared at the Printemps de Bourges Festival, opening for JJ Burnel, as part of his second solo album tour, Un Jour Parfait, for which Dominique Buxin wrote some lyrics.
Together, they gave two concerts in Brussels on April 30 and May 5, with JJ Burnel as special guest, singing Je T'ai Toujours Aimée on stage for the very first time.
In July 2011, Polyphonic Size line-up changes again, with Jill and Géraldine (from the Belgian band Les Vedettes) replacing France Lhermitte on vocals until the end of 2012.