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Accompanist... Improve your musical improvisation with Accompanist by Thelonious Software!
  • Easily input a sequence of chords, and Accompanist will generate piano accompaniment in a variety of musical styles.
  • Use the intuitive editing tools to tweak this accompaniment or to create your own.
  • Then, play along right inside Accompanist, or export tracks to Garageband!
With Accompanist, you'll be able to play faster, more accurately, and with more confidence. Learn to improvise over any set of chords, in any key, at any tempo.

What's New

Version 1.0.3:
  • Removed default Cmaj chord for new songs.
  • Fixed a bug where resize cursors were not drawn for SmartNoteEvents in bottom row.
  • Fixed a bug where users could edit chord names in Chord Event Inspector sheet.
  • Fixed a bug where new songs would not draw until resized while recording screencast with iShowU.


Mac OS X 10.4.9 or later

*Previously available here

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Current Version (1.x)


Downloads 3,756
Version Downloads 2,440
License Free
Date 01 Apr 2008
Platform OS X / PPC 32 / Intel 32
Price Free
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