The original PLATO music concept was to replace the human performer in the feedback process, wherein the composer specifies an action and monitors the outcome, with a computer-controlled device. The first device of this type is known as the Gooch Synthetic Woodwind (GSW), which attempted to provide some of the features needed in an interactive, compositional facility, and many of those needed for computer-based music instruction. In the case of GSW, a PLATO-compatible music language was developed, as well as a compiler for this language, two music text editors, a filing system for music binaries, programs to play the music binaries in real time, and many debugging and compositional aids. A number of interactive compositional programs have also been written. With the advent of microprocessor technology, new PLATO terminals were developed to be less expensive and more flexible than the PLATO IV terminals. The 8080 microcomputer system in PLATO V terminals is capable of executing programs locally; it can also be connected directly to terminal peripheral devices. The goal of this system is to provide tools for music educators to use in the development of instructional materials, which might possibly include music dictation drills, automatically graded keyboard performances, envelope and timbre ear-training, interactive examples or labs in musical acoustics, and composition and theory exercises with immediate feedback. (VT)