Other studies examined technical issues related to MIDI and to musical representation on the computer. Some studies describe technical algorithms for sound synthesis and sampling. Some studies addressed issues related to music notation such as the difficulty of producing musical symbols on the computer screen or the representation of pitch in a format which computers could understand. Some studies proposed the expansion of notational practice to include effects not possible in common music notation and suggested systems for doing so. One study examined the problem of scanning a piece of music into the computer and converting it into a score or standard MIDI file.
Studies generally indicate that computer use by music teachers is only beginning.
Another common finding is that student attitude toward CAI is generally positive. In a few studies databases and expert systems have been developed. In one study an expert system was developed which allows a band director to enter the instrumentation and characteristics of his or her band. The computer then lists literature appropriate for the ensemble. New literature may also be entered into the computer's database.