Brain's first recording was of Mozart's Divertimento in D major, K.334 in February, 1939 with the Léner Quartet.
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He also appears with the Léner Quartet in the Columbia Records electric microphone recordings of the Beethoven Septet in E flat major and the (1928) Schubert Octet in F major, with Charles Draper (clarinet), E.W. Hinchliffe (bassoon) and Aubrey Brain (French horn).