smfimage

Converts a Standard MIDI File (SMF) file to an image (PNG), based on keys and timing; separated by track.

Status

usable (experimental)

Installation of the CLI tool

 go install gitlab.com/gomidi/midi/tools/smfimage/cmd/smfimage

Usage

The following command creates the file my-midi-file.png reflecting the notes of midi-file.mid

 smfimage my-midi-file.mid

Colors are set based on the interval to the basenote (defaults to "C"). You can pass the base note to the command line via -b.

For more options

 smfimage help

The following color mapping is used

prime/octave  -> yellow
minor second  -> mint
major second  -> orange
minor third   -> sky blue
major third   -> spring green
fourth        -> cyan
tritone       -> lime/chartreuse
fifth         -> royalblue
minor sixth   -> pink
major sixth   -> violett/purple
minor seventh -> magenta
major seventh -> red

If you want to define own mappings, use the library and create a ColorMapper.

Examples

color note mapping

monochrome mode: velocity mapping: quiet (red) <-> loud (yellow)

Documentation

smfimage can also be used as library, see https://pkg.go.dev/gitlab.com/gomidi/midi/tools/smfimage