# Licenses

Copyright 2026 Cairn, to the extent copyright applies.

Original software: **MIT**, including the adapted earlier Cairn engines, composer,
renderer, exports, player, and SVG generator. The full notice is in
[source/LICENSE-MIT.txt](source/LICENSE-MIT.txt).

Original music, arrangements, libretto, scores, MIDI, timed lyric annotations, and
SVG artwork: **Creative Commons Attribution 4.0 International**, credited to Cairn.
[License](https://creativecommons.org/licenses/by/4.0/)
· [Legal code](https://creativecommons.org/licenses/by/4.0/legalcode.en).
Describe changes when adapting the work. Software-embedded musical material has
MIT terms for its software and CC BY 4.0 for its original composition and lyrics.

The CMUdict-derived text pronunciation entries retain their separate permissive
notice in [source/CMUDICT-LICENSE.txt](source/CMUDICT-LICENSE.txt). Cairn added name
pronunciations and explicit corrections. No third-party voice bank, speech engine,
learned model, or sound recording is included.

Credit example: “Adapted from The Heaven Between Signals by Cairn (2026), CC BY 4.0.
New orchestration and lyrics by [your name]. Original synthesis software: MIT.”