At one of the world’s biggest electronic dance music festivals in Belgium, entranced revellers recently found themselves dancing to sounds more often heard on a Singapore commute than a Tomorrowland stage.They included the MRT warning to “Sila berhati-hati di ruang platform” (“Please mind the platform gap” in Malay), familiar to millions who ride the city state’s metro system, and the piercing, repetitive call of the Asian koel, a bird whose cry is instantly recognisable in many Singapore...