Schemata

Introduction

Voice-leading schemata are important building blocks in tonal music. In the context of this project they are characterized as sets of voices that move in a coordinated way through a number of stages. On the musical surface, this structure can be ornamented and elaborated, so a major challenge is to discover (and/or annotate) the skeleton of a schema in the music.

Setup

This repository contains Julia code and notebooks for the schema project. To use it, clone this repo and install the dependencies. This can be done by running julia inside its top-level directory, pressing ] to enter the package manager mode, and typing

(v1.x) pkg> activate .
(schemata_code) pkg> instantiate

The first command activates the repo's environment. The second command downloads all dependencies such as DigitalMusicology.jl in the version specified in this package.

Some of the notebooks require a separate corpus (branch schemata). The git repository of that corpus should be cloned to data/dcml_corpora by default. Keeping the corpus in a different location requires adapting some paths in the annotation notebooks.

$ cd data
$ git clone git@github.com:DCMLab/corpora.git dcml_corpora
$ cd dcml_corpora
$ git checkout schemata

Alternatively, a fork of that repo can be used in combination with pull requests. If you don't use a fork (and have commit access to the corpus repo), then add annotations on a feature branch that you push to the repo and use a pull request in order to get your branch merged.

Code Structure

• src/Polygrams.jl provides basic functionality for handling schemata and serves as the main entry point of the package.
• src/matcher.jl contains a schema matcher based on nested skipgrams (polygrams).
• src/autoannot.jl contains Interact widgets for creating semi-automatic schema annotations.
• src/io.jl contains I/O code for schema annotations and lexica.
• src/counting.jl contains older code for counting occurrences of certain classes of polygrams.
• deps/ contains JS code for some of the widgets.
• app/rundemoapp.jl is a starter for a web-app (dysfunctional)
• app/prepare_corpus.jl is a script that adds note IDs to all MusicXML files in a directory.

Notebooks

These are the most important notebooks in the notebooks directory:

• Mozart Annotation.ipynb is preconfigured for adding annotations for the Mozart piano sonatas.
• Review Annotations.ipynb allows to review and correct annotations (set to Mozart piano sonatas by default, WIP).
• Interactive Annotation.ipynb demonstrates the usage of the interactive annotation widgets.