“Beatriz Ferreyra turned 84 this year and is still composing music – dense, immersive sound sculptures – as the last surviving member from the field of mid-20th-century pioneers that included the likes of Edgard Varèse and Pierre Henry. She was born in Argentina but has spent the last six decades in France, where she relocated in 1961 to study with Nadia Boulanger and György Ligeti. Like many émigr”