A feasibility (development) course investigating Computer Assisted Instruction in instrumental music was designed and administered over an eight-week trial period to 14 clarinetists of varying ability in grades seven through ten. The course concentrated on articulation, phrasing, and rhythm. Generally, a dual program was developed. 1) an aural program on-line (via CAI) emphasizing aural-visual discrimination, and 2) a playing-recording program off-line (without computers) using specially modified tape recorders programed with pre-recorded models. Some on-line recording was also done to coordinate the playing and ear-training programs more closely. After reviewing student records the program was extensively revised and is now functional on the IBM 1500 Instructional System. The present system can: present models for the student to compare with his recorded version, coordinate presentation of aural-visual stimuli, and process student typewriter or pen responses. Tables and figures of a student progress are included, and five appendices illustrate the music dictionary (for the computer), flow charts, extracts from a course listing, the instructional display planning guide, and pictures of the learning/teaching progress. (Author/SH)