musical notation is an activity that can and should be approached from a computer in contemporary musical life. In music education, in practice amateur and professional musical performance, in composition, orchestration, intellectual property registration, etc.., Etc., Etc., Is always present musical notation. From the legendary Finale version 1.0, released in 1987 for Macintosh to the current (2010), through Encore, Igor, Sibelius and a few others, all computer programs designed to meet the needs of musicians, music students and teachers in musical notation is concerned, have two characteristics in common, namely: 1) start from the paradigm "what you see is what you get" (WYSIWYG) and 2) are licensed proprietary software.
musical notation, graphical phenomenon is highly complex (albeit as a sign system is simple and easy to learn). Reading and writing music can be relatively simple, but composing a piece (which is different to write music that is written in a score) to be suitable for publication or use, it is not. The art design scores are made primarily from nineteenth-century German newspaper, was a floor of a high quality and codification of what is a score "well done" that a man who puts his best efforts to master a art as the music makes it extremely difficult to master also have other art: to make scores. So there until the middle of last century the master engravers of scores, a job that is not learned in less than ten years. With the advent of computer music, publishers turned this noble profession at all, making it disappear like cartoonists disappeared Disney. A program and an operator occupied since that place.
An application that tries to show all the time what you want as a result you get, it lacks the ability to process the best location of graphic objects involved in musical notation, thus leaving the operator's hands many tasks it could be automated, for example may be the precise location of the numbers of bars, avoid collisions notes, articulations, slurs, etc..
Instead, an application that takes all the time in the world to process the best available graphic elements conforming a score frees the operator from routine tasks, in most cases, requires a knowledge of the design standards of a score, knowledge as we have said is not something you learn from the overnight, and that a student or a musician or music teacher usually ignored.
A proprietary license application may be a good choice for a publishing company, but is clearly exclusive to teachers, students and musicians in general, especially if they are economically marginalized these latitudes.
Instead, a GNU license application (free) makes it accessible to all stakeholders assistive technology to one of the oldest arts of mankind.