Walter S. “Wally” Collins, professor emeritus of music and a former associate dean of the College of Music at the University of Colorado at Boulder, died June 30 of a brain aneurysm in Hyannis Port, Mass. He was 71. Collins and his wife, Jenny Kate, of Boulder, were vacationing in Cape Cod last week when the aneurysm occurred. He was admitted to Cape Cod Hospital on June 25 and never regained consciousness.