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Play music with difficult chords easily on any MIDI instrument

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ChordEase lets you play music with difficult chords easily on any MIDI instrument. Though it's primarily intended for jazz, it could be useful for any type of music that modulates frequently. ChordEase ensures that all your notes are harmonically correct, but leaves their sequence and rhythm up to you. In other words, ChordEase handles the rapid music theory calculations, so you can relax and concentrate on groove, feel, and aesthetics.

ChordEase plays songs, which are prepared beforehand. You're expected to stay in sync with ChordEase, and it provides a metronome to facilitate this. Normally you play only in the key of C major, and your notes are then adjusted in real time to fit the song's harmony, using various schemes. Any number of performers can perform through a single instance of ChordEase, using any number of MIDI instruments. Any number of parts can be defined, splits and layers can be set up, and parameters can be changed in real time via MIDI controllers.

ChordEase Web Site


  • Play difficult chord progressions with ease, even at scary tempos
  • Chord dictionary is customizable; use any set of symbols you like
  • Compatible with virtually any MIDI instrument, not just keyboards
  • Powerful enough to handle an entire band at once
  • Output can be recorded and exported as a standard MIDI file
  • MIDI input and output can be monitored in real time with filtering
  • Sophisticated chord accompaniment can be played with one finger
  • Control chord variation, voicing, and arpeggiation via MIDI
  • Bass function includes fixed-length or MIDI-triggered approach
  • Songs are plain text files that use a simple but flexible syntax
  • Harmonic anticipation can be adjusted differently for each part
  • Parameters can be changed in real time via MIDI controllers
  • MIDI assignments can be learned instead manually entering them
  • Song charts can be displayed in custom fonts and printed


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Additional Project Details

Intended Audience

Education, Advanced End Users, End Users/Desktop

User Interface

Win32 (MS Windows), Windows Aero

Programming Language



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