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undertheory\n\n*Music-theoretic LFE modules: notes, intervals, keys, scales, modes, melody-generation, etc.*\n\n[![Build Status][gh-actions-badge]][gh-actions]\n[![LFE Versions][lfe badge]][lfe]\n[![Erlang Versions][erlang badge]][versions]\n[![Tag][github-tag-badge]][github-tag]\n\n[![][logo]][logo-large]\n\n## Dependencies \u0026 Setup\n\nThis application assumes that the following are on your system:\n\n* `git`\n* A modern install of Erlang (v25+)\n* [rebar3](https://www.rebar3.org/) (Erlang build tool)\n\n## Build \u0026 Run\n\n```shell\nrebar3 compile\n```\n\nStart up the LFE REPL:\n\n``` shell\nrebar3 lfe repl\n```\n\n## Examples\n\nNotes:\n\n``` lisp\nlfe\u003e (uth.note:name 0)\nC\nlfe\u003e (uth.note:name 0 #(all))\n(C B# Dbb)\nlfe\u003e (uth.note:number 'Gb)\n6\n```\n\nIntervals:\n\n``` lisp\nlfe\u003e (uth.interval:name 'C 'Eb)\nm3\nlfe\u003e (uth.interval:name 'C 'G)\nP5\nlfe\u003e (uth.interval:name 'C 'Bb)\nm7\nlfe\u003e (uth.interval:above 'C 'm3))\n(D# Eb Fbb)\nlfe\u003e (uth.interval:above 'C 'm3 #(flat))\nEb\n```\n\nScales:\n\n``` lisp\nlfe\u003e (uth.scale:locrian)\n(1 b2 b3 4 b5 b6 b7)\nlfe\u003e (uth.scale:as-intervals 'locrian)\n(P0 m2 m3 P4 dim5 m6 m7)\nlfe\u003e (uth.scale:as-notes 'C 'lydian)\n(C D E F# G A B)\nlfe\u003e (uth.scale:as-notes 'C 'aeolian '#(flat))\n(C D Eb F G Ab Bb)\nlfe\u003e (uth.scale:as-notes 'Eb 'ionian)\n(Eb F G Ab Bb C D)\n```\n\nInversions:\n\n``` lisp\nlfe\u003e (uth.notes:invert 'Bb '(D Eb F D F G Bb A G Bb D) #(flat))\n(Bb A G Bb G F D Eb F D Bb)\n```\n\n[//]: ---Named-Links---\n\n[logo]: priv/images/project-logo.png\n[logo-large]: priv/images/project-logo-large.png\n[gh-actions-badge]: https://github.com/ut-proj/undertheory/workflows/ci%2Fcd/badge.svg\n[gh-actions]: https://github.com/ut-proj/undertheory/actions\n[lfe]: https://github.com/lfe/lfe\n[lfe badge]: https://img.shields.io/badge/lfe-2.1-blue.svg\n[erlang badge]: https://img.shields.io/badge/erlang-25+-blue.svg\n[versions]: 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