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Lexikon-Sonate is an interactive realtime composition environment for musical composition and live performances. It takes advantage of composition algorithms that has been developed by Karlheinz Essl since the 1980's. With this algorithmic music generator on can easily create fascinating and complex musical structures on the fly.

Lexikon-Sonate is an infinite music installation that can run on a computer for years without repeating itself. It can also be used as a computer instrument for live performances.

What's New

Version 4.0.1:
  • Improved sound quality thanks to the mda Piano VST plug-in (I finally got rid of the pesky Quicktime piano sound...)
  • MIDI control added which allows to perform the piece with an external MIDI controller (faderbox)
  • New user interface
  • Runs with Mac OS X 10.4 - 10.7


  • Mac OS X 10.4 or later
  • Quicktime

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Lexikon-Sonate User Discussion

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Marba Member IconReview+2

This is amazing.

Amazing because of an algorithm and instruments (probably MIDI), it generates rhythmic "music" with beats and tempo.

Listeners may be pleased to hear "virgin" tunes, as claimed.

This may be useful to play in public, in cafe or arts galleries, etc. context doing away with music copyrights.

What I wish for:
- selectable tempo, algorithms for slow, hot, fast pace, etc. genres of music.

Thank you to the creators for this.

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Version 3.3
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> 4 1


Current Version (4.x)


Downloads 4,545
Version Downloads 938
License Free
Date 07 Dec 2010
Platform OS X / PPC 32 / Intel 32
Price Free
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