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ChordPlay

ChordPlay is an algorithmic composition tool for exploring chord progressions via a simple command line interface. Its key features are:

  • Find and play a minimal voice leading
  • Improvise a simple melody over the chord sequence
  • Loop the given chord sequence endlessly so you can improvise over it with your own instrument

Prerequisites

  • cmake (for building from source)
  • RtMidi
  • libpopt

Basic Usage

Run ChordPlay from the command line with a chord sequence as arguments, e.g.

chordplay C F G7 C

ChordPlay will automatically compute and print a minimal voice leading. To play back the chord sequence, you need to have a General MIDI synthesizer (such as FluidSynth or TiMidity++) running and pass the -p argument to Chordplay:

chordplay -p C F G7 C

To let ChordPlay additionally improvise a random melody over the given chord sequence, additionally pass the -i argument:

chordplay -p -i C F G7 C