Tanzania’s national sound? What happens when singeli, a genre born in Dar es Salaam’s working-class underground, becomes a symbol of national culture, embraced by the very state that once distrusted it? In a video posted on Boiler Room’s Instagram, a voice declares: “Singeli is the national rhythm of Tanzania.” In just a little over a decade, Singeli, with its electronic, high-tempo fusion of Mchi...