pedrozath/coltrane
🎹🎸A music theory library with a command-line interface observed · 2026-08-28
Health v2 · maintenance only
34/100
- Activity 4
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3382
- days_rel: n/a
- days_push: 581
- n_releases_24m: 0
Adoption not part of the score
2398 stars · 69 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Coltrane is a Ruby music theory library with a companion command-line interface for calculating chords, scales, and chord progressions. It renders results as guitar, bass, piano, or ukulele fretboard/fingering diagrams directly in the terminal.
Use cases
- find the name of a chord from a set of notes
- discover scales containing a given chord or note set
- generate chord progressions for jazz, blues, or pop
- see how to play a chord on guitar or ukulele
- find chords common between two scales
- explore music theory from the terminal
When to choose
- you want a scriptable music theory calculator in Ruby
- you need chord/scale answers without reading sheet music
- you want instrument-specific voicings rendered in the terminal
When to avoid
- you need audio playback or MIDI production features
- you want a GUI music theory app
- you work outside Ruby and don't want a CLI dependency
Facets
cli-tool · maturity active
cli education cli cross-platform music-theory chords scales ruby-gem guitar piano command-line
1 source
- readme: https://github.com/pedrozath/coltrane · fetched 2026-08-28 · 30d168306060
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| pedrozath/coltrane | main | 34 |
For agents
markdown · JSON · MCP: product_card(name="pedrozath/coltrane")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem