The July 1991 issue of _Computer_, (Vol 24, #7, ISSN 0018-9162), published by the IEEE Computer Society, has the title "Computer Generated Music", and a whole bunch of neat articles.

Formula: A Programming Language for Expressive Computer Music_ David P. Anderson and Ron Kuivila

Formula, a language for controlling synthesizers, can model the expressiveness of a human performance. It supports algorithmic composition, interactive performance, and programmed interpretation of traditional scores.