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The other day we had a meeting at work with a former colleague (now at QMUL ) to discuss general project progress. The topics covered included the somewhat complicated workflow that we're using for doing optical music recognition (OMR) on early printed music sources. It includes mensural notation specific OMR software called Aruspix . Aruspix itself is fairly accurate in its output, but the reason why our workflow is non-trivial is that the sources we're working with are partbooks; that is, each part (or vo
Anyway, our colleague from QMUL was very interested in this little part of the project and suggested that we spend the afternoon, after the style of good software engineering, formalising the workflow. So that's what we did. During the course of the conversation diagrams were drawn on the whiteboard. However (and this was really the point of this post) I made notes in Haskell. It occurred to me a few minutes into the conversation that laying out some types and the operations over those types that comprise o