A Brief Survey of Music Representation Issues, Techniques, and Systems
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@MISC{Dannenberg_abrief,
author = {Roger B Dannenberg},
title = {A Brief Survey of Music Representation Issues, Techniques, and Systems},
year = {}
}
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Abstract
ly, there is a mathematical function that maps beat numbers to time and an inverse function that maps time to beats. (Some special mathematical care must be taken to allow for music that momentarily stops, instantaneously skips ahead, or is allowed to jump backwards, but we will ignore these details.) One practical representation of the beat-to-time function is the set of times of individual beats. For example, a performer can tap beats in real time and a computer can record the time of each tap. This produces a finitely sampled representation of the continuous mapping from beats to time, which can be interpolated to obtain intermediate values. MIDI Clocks, which are transmitted at 24 clocks per quarter note, are an example of this approach. The Mockingbird score editor [Maxwell 84] interface also supported this idea. The composer would play a score, producing a piano-roll notation. Then, downbeats were indicated by clicking with a mouse at the proper locations in the piano roll score....
