Nearly 21 years after her death, Elizabeth Maconchy remains one of 20th-century Britain’s most alluring forgotten voices. International in outlook, she wrote music of great lyricism and subtlety, closer to the sound-world of Central Europe than to that of the English musical establishment. Today the Signum Quartet, one of BBC Radio 3’s New Generation Artists, pairs Maconchy’s Bartók-influenced String Quartet No. 3 with another work of meticulously compressed emotionalism, Brahms’s F minor Piano Quintet. Norwegian pianist and fellow NGA Christian Ihle Hadland joins them.