“In a career stretching back to the 1950s and continuing into his 90s, Dr. Nketia wrote hundreds of articles and books in English and Twi, a Ghanaian language, on topics ranging from music theory to folklore, as well as scores of compositions. … His 1974 book, The Music of Africa, is widely considered a definitive historical study, and Ethnomusicology and African Music, a collection of his writings published in 2005, is used in classrooms throughout Africa and across the world. – The New York Times