https://github.com/go-music-theory/music-theory
Music theory models in Go
There's an example command-line utility music-theory.go to demo the libraries, with a bin/ wrapper.
To build and install music-theory to your machine:
make install
Then, to calculate the note pitch classes for a specified Chord:
$ music-theory chord "Cm nondominant -5 679"
root: C
tones:
3: D#
6: A
7: A#
9: D
To list the names of all the known chord-building rules:
$ music-theory chords
- Basic
- Nondominant
- Major Triad
- Minor Triad
- Augmented Triad
- Diminished Triad
- Suspended Triad
- Omit Fifth
- Flat Fifth
- Add Sixth
- Augmented Sixth
- Omit Sixth
- Add Seventh
- Dominant Seventh
- Major Seventh
- Minor Seventh
- Diminished Seventh
- Half Diminished Seventh
- Diminished Major Seventh
- Augmented Major Seventh
- Augmented Minor Seventh
- Harmonic Seventh
- Omit Seventh
- Add Ninth
- Dominant Ninth
- Major Ninth
- Minor Ninth
- Sharp Ninth
- Omit Ninth
- Add Eleventh
- Dominant Eleventh
- Major Eleventh
- Minor Eleventh
- Omit Eleventh
- Add Thirteenth
- Dominant Thirteenth
- Major Thirteenth
- Minor Thirteenth
To calculate the note pitch classes for a specified Scale:
$ music-theory scale "C aug"
root: C
tones:
1: C
2: D#
3: E
4: G
5: G#
6: B
To list the names of all the known scale-building rules:
$ music-theory scales
- Default (Major)
- Minor
- Major
- Natural Minor
- Diminished
- Augmented
- Melodic Minor Ascend
- Melodic Minor Descend
- Harmonic Minor
- Ionian
- Dorian
- Phrygian
- Lydian
- Mixolydian
- Aeolian
- Locrian
To determine a key:
$ music-theory key Db
root: Db
mode: Major
relative:
root: Bb
mode: Minor
Credit
Note
A Note is used to represent the relative duration and pitch of a sound.
Key
The key of a piece is a group of pitches, or scale upon which a music composition is created in classical, Western art, and Western pop music.
Chord
In music theory, a chord is any harmonic set of three or more notes that is heard as if sounding simultaneously.
Scale
In music theory, a scale is any set of musical notes ordered by fundamental frequency or pitch.
