Conversion beween midi and csv files.
The package contains 2 function, midi2csv and csv2midi. They take an input file of one type and produce an output file of the otehr type.
The csv files can be read into R dataframes and manipulated, and the output then can be written to a midi file and played.
The package makes heavy use of of the C sources for converting between midi and csv file formats by John Walker, available at Fourmilab. This website also has the documentation of the csv file format used.