A scorewriter, or notation software or music notation processor, is software used for creating sheet music. A scorewriter is to music notation what a word processor is to text, in that they both allow fast corrections (undo), flexible editing, easy sharing (via the internet or compact storage media), and clean, uniform layout. In addition, most scorewriters are able to sound out and record the notes—especially useful for novice composers or when no musicians are readily available—making them, by the same analogy, both word processors and previsualization software.

A scorewriter, or notation software or music notation processor, is software used for creating sheet music. A scorewriter is to music notation what a word processor is to text, in that they both allow fast corrections (undo), flexible editing, easy sharing (via the internet or compact storage media), and clean, uniform layout. In addition, most scorewriters are able to sound out and record the notes—especially useful for novice composers or when no musicians are readily available—making them, by the same analogy, both word processors and previsualization software.