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I Couldn't Wait Any Longer: Complete Ooloi Documentation Released

6/7/2025

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​I've been saying I'm itching to open source Ooloi, but waiting for the complete software felt increasingly artificial. The documentation tells the real story – twenty-five years of architectural evolution from Igor Engraver through AWS systems thinking to this closure in Clojure.

So here it is: the complete Ooloi documentation collection, released publicly ahead of the software itself.
What you'll find:
  • Comprehensive guides teaching advanced Clojure through musical problems
  • Complete architectural decision records showing our thinking
  • The timewalker guide (with three Rocky Horror references, naturally)
  • Real functional programming education through meaningful domain examples

This represents my attempt to walk the talk after critiquing FP drawbridge syndrome. These guides serve dual purpose: they document sophisticated music notation architecture whilst teaching functional programming concepts through examples that actually matter.

The timewalker guide alone demonstrates transducers, lazy sequences, and functional composition through orchestral score traversal. The polymorphic API guide teaches multimethods through musical type systems. The concurrency patterns show STM coordination through collaborative editing.

Twenty-five years of thinking, distilled into something that I hope proves useful beyond music software. The architecture is complete; the foundations are solid. Now you can see why I've been eager to share this work.

An organism evolved, indeed.
​
Explore the complete documentation: https://github.com/PeterBengtson/Ooloi-docs

​/Peter
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    Author

    Peter Bengtson –
    Cloud architect, Clojure advocate, concert organist, opera composer. Craft over commodity. Still windsurfing through parentheses.

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Ooloi is an open-source desktop music notation system for musicians who need stable, precise engraving and the freedom to notate complex music without workarounds. Scores and parts are handled consistently, remain responsive at scale, and support collaborative work without semantic compromise. They are not tied to proprietary formats or licensing.
​
Ooloi is currently under development. No release date has been announced.


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  • Home
  • Overview
    • Background and History
    • Project Goals
    • Introduction for Musicians
    • Introduction for Programmers
    • Technical Comparison
  • Documentation
  • About
  • Contact