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Hyperscore is a computer-assisted music composition program intended to make the creation of music readily accessible to experienced musicians as well as those without any musical training. To accomplish this, the software maps complex musical concepts to intuitive visual representations. Color, shape, and texture are used to convey high-level musical features such as timbre, melodic contour, and harmonic tension.

Hyperscore has received international media attention and awards. It has been featured in numerous news and journal publications, as well as television programs such as Scientific American Frontiers.

Composing
Users of Hyperscore compose music by first creating simple melodies or sequences of notes. A library of predefined elements is also provided. These melodies are assigned unique colors. The user then creates a musical sketch composed of colored lines, where each line instances the notes from the corresponding melody. The contour and position of the line alters the pitch at which notes are played back.

The software can optionally use different classes of harmony to organize the given notes, in order to easily generate more pleasing results. The effects of the harmony algorithms can be controlled by contours in a special line presented throughout the sketch. Modulations and sections of harmonic tension and resolution can be introduced in this manner, adding interest and variation to the music.

Hyperscore also provides users with control over tempo and dynamics. MIDI synthesis is used for audible output from within the application and all General MIDI voices are available for use.

History
Hyperscore was developed by researchers in the Opera of the Future group at the Massachusetts Institute of Technology Media Lab. Early versions of the software allowed users to generate novel compositions from predefined motives by sketching lines indicating patterns of musical tension.

The application evolved to play a prominent role in the Toy Symphony. During an international tour of this project, children were given the opportunity to compose orchestral pieces using Hyperscore, which were then performed in concert along with other works utilizing traditional and technologically enhanced instruments and approaches.

Current applications
Hyperscore has since become a commercial product and is currently maintained and developed by Harmony Line, Inc. The software continues to serve a pedagogical role in music education. It has also become a key component of the H-Lounge, an online music and ring tone-oriented social networking community. A free limited version of Hyperscore is available to H-Lounge users who can use the software to create and share original ring tones through the web site and purchase them for use on mobile phones.