A set of scripts for dealing with directory trees of Lilypond files

These scripts were originally written to batch-process (part of) the Mutopia database of Lilypond music scores, piping it through the Timidity++ synthesizer, in order to create a dataset for use in score-informed audio source separation projects. If you any of these files useful, please consider citing the following paper, which it was developed for:

@InProceedings{Ganseman2010,
  Title     = {Source separation by score synthesis},
  Author    = {Ganseman, J. and Mysore, G.J. and Scheunders, P. and Abel, J.S.},
  Booktitle = {Proc. International Computer Music Conference (ICMC 2010)},
  Year      = {2010},
  Month     = {June},
  Address   = {New York, NY},
  Pages     = {462-465},
  Url       = {https://ccrma.stanford.edu/~jga/icmc2010/icmc2010.html}
}

Mutopia's files can be downloaded from their FTP directory.

There are 7 Bash scripts in this directory, which assume the directory structure is read/writable by the user and that Lilypond and Timidity are installed:

• zipdirs.sh / unzipdirs.sh: (Un)zip all subdirectories in a given directory
• prunefiletype.sh: Remove subdirs that don't contain a given amount of a given filetype
• extractfiles.sh: Extract all files with a given extension from a directory tree
• updately.sh: Try to update all Lilypond files to the most recent version
• lilybatch.sh: Run lilypond on all applicable files in a directory tree (.ly -> .mid)
• timidibatch.sh: Run Timidity on all applicable files in a directory tree (.mid -> .wav)

All of this was written in 2009-2010 and has not been updated since. No guarantee is given that it still works on recent Linux distros, with recent versions of Lilypond, or with more recent Mutopia files. These scripts are just published FYI, hence all use is at your own risk ;)