https://github.com/brettbuddin/musictheory

🎵 Music theory concepts in Go.
https://github.com/brettbuddin/musictheory

audio go midi music music-theory

Last synced: 3 days ago
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🎵 Music theory concepts in Go.

• Host: GitHub
• URL: https://github.com/brettbuddin/musictheory
• Owner: brettbuddin
• License: mit
• Created: 2015-08-22T16:05:04.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2024-07-24T02:42:24.000Z (5 months ago)
• Last Synced: 2024-07-24T04:47:03.233Z (5 months ago)
• Topics: audio, go, midi, music, music-theory
• Language: Go
• Homepage:
• Size: 91.8 KB
• Stars: 74
• Watchers: 6
• Forks: 8
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Music Theory

[![Build Status](https://travis-ci.org/brettbuddin/musictheory.svg?branch=master)](https://travis-ci.org/brettbuddin/musictheory)

[![GoDoc](https://godoc.org/github.com/brettbuddin/musictheory?status.svg)](https://godoc.org/github.com/brettbuddin/musictheory)

Explorations in music theory.

## Usage

```go

package main

import (

    mt "github.com/brettbuddin/musictheory"

    "github.com/brettbuddin/musictheory/intervals"

)

func main() {

    root := mt.NewPitch(mt.C, mt.Natural, 4)

    root.Name(mt.AscNames) // C4

    root.Freq()            // 261.625565 (Hz)

    root.MIDI()            // 72

    P5 := mt.Perfect(5)   // Perfect 5th

    A4 := mt.Augmented(4) // Augmented 4th

    root.Transpose(P5).Name(mt.AscNames)          // G4

    root.Transpose(A4).Name(mt.AscNames)          // F#4

    root.Transpose(P5.Negate()).Name(mt.AscNames) // F3

    mt.NewScale(root, intervals.Dorian, 1)

    // [C4, D4, Eb4, F4, G4, A4, Bb4]

    mt.NewScale(root, intervals.Mixolydian, 2)

    // [C4, D4, E4, F4, G4, A4, Bb4, C5, D5, E5, F5, G5, A5, Bb5]

    rootPosition := mt.NewChord(root, intervals.DiminishedSeventh)

    // [C4, Eb4, Gb4, A4]

    firstInversion := rootPosition.Invert(1)

    // [C5, Eb4, Gb4, A4]

    secondInversion := rootPosition.Invert(2)

    // [C5, Eb5, Gb4, A4]

    note := mt.NewNote(root, mt.D16) // C4 sixteenth note

    note.Time(mt.D4, 120)            // 125ms (quarter note getting the beat at 120 BPM)

}

```

楽しみます！