Barry Cooper (born 1949) is an English musicologist, composer, organist, Beethoven scholar, and editor of the Beethoven Compendium.
Born in Westcliff-on-Sea in Essex, Cooper studied piano and composition in his childhood, leading to scholarships to Gordonstoun School and later to University College, Oxford, where he studied organ with John Webster and earned an MA in 1973 and a DPhil in 1974. His musical compositions include an oratorio, The Ascension.
But Cooper is best known for his books on Beethoven (including the 'Beethoven Compendium'), as well as a completion and realization of Beethoven's fragmentary Symphony No. 10. Having extensively studied Beethoven's sketchbooks and written a book about them, Beethoven and the Creative Process, Cooper felt confident enough to identify the sketches for the individual movements of the Symphony and put together those for the first movement into a musically satisfactory whole. The realisation was recorded by the London Symphony Orchestra conducted by Wyn Morris. It was then revised and received its public premiere in 1988 by the Royal Liverpool Philharmonic Orchestra, conducted by Walter Weller. In a way, this fulfilled Beethoven's promise of his Symphony No. 10 to the Royal Philharmonic Society, since the premiere was at a concert given by this society. Several recordings are available.