Broido joined the Presser Company, whose roster includes Persichetti, Rochberg, Tsontakis and Chen Yi, in 1969. He studied piano at the Mannes and Juilliard Schools before graduating from Ithaca College in 1941, and later joined the U.S. Coast Guard during World War II.
Unable to find teaching jobs after the war, Broido joined Boosey & Hawkes as head of the stockroom and eventually became editor. His career in music publishing continued at Century and Mercury Music, E.B. Marks, Frank Music Corporation and Boston Music before he joined Presser as president in 1969.
From 1972 to 1979, Broido served on ASCAP's board of directors; he was re-elected in 1981. Voted treasurer in 1990, he also received that year an honorary doctorate from Ithaca College in recognition of his activities on behalf of contemporary music and intellectual property.
"Arnold made significant contributions in American music education, and occupied an important position in international publishing," said ASCAP CEO John LoFrumento, calling him a "visionary leader in the world of serious and concert music."
"He was articulate, witty, steadfast in his opinions and very wise, indeed," said ASCAP president Marilyn Bergman. "The music publishing world has lost one of its brightest lights, a champion of the rights of creators and a vital advocate of contemporary American concert music. We will miss him greatly."
Broido is survived by Lucy Broido, his wife of 63 years, and their three sons, Thomas (of Havertown, Pennsylvania), Laurence (of Ardmore, Pennsylvania) and Jeffrey (of Morristown, New Jersey) and three grandchildren.