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Simon Heimler
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| import { Scale } from "@tonaljs/tonal"; | ||
| import * as midiWriter from 'midi-writer-js' | ||
| import * as fs from "fs-extra" | ||
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| interface ScaleInfo { | ||
| /** scale symbol, as understood by tonal.js */ | ||
| symbol: string | ||
| /** Filename. Falls back to symbol if not given */ | ||
| fileName?: string | ||
| /** MIDI title. Falls back to symbol if not given */ | ||
| title?: string | ||
| } | ||
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| /** | ||
| * Notes that we want to generate scales for | ||
| */ | ||
| const notes = ['C', 'C#', 'Db', 'D', 'D#', 'Eb', 'E', 'F', 'F#', 'Gb', 'G', 'G#', 'Ab', 'A', 'A#', 'Bb', 'B'] | ||
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| /** Octave to generate the scales for */ | ||
| const noteOctave = 4 | ||
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| /** | ||
| * Scales to generate. | ||
| * @see https://github.com/tonaljs/tonal/blob/main/packages/scale-type/data.ts for theoretically supported scale types | ||
| */ | ||
| const scaleTypesVariant1: ScaleInfo[] = [ | ||
| // 5-note scales | ||
| { symbol: 'major pentatonic'}, | ||
| { symbol: 'minor pentatonic'}, | ||
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| // 6-note scales | ||
| { symbol: 'major blues'}, | ||
| { symbol: 'minor blues'}, | ||
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| // 7-note scales | ||
| { symbol: 'major'}, | ||
| { symbol: 'minor'}, | ||
| { symbol: 'dorian'}, | ||
| { symbol: 'phrygian'}, | ||
| { symbol: 'lydian'}, | ||
| { symbol: 'mixolydian'}, | ||
| { symbol: 'locrian'}, | ||
| { symbol: 'harmonic minor'}, | ||
| { symbol: 'harmonic major'}, | ||
| { symbol: 'melodic minor'}, | ||
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| // 8-note scales | ||
| { symbol: 'bebop major'}, | ||
| { symbol: 'bebop minor'}, | ||
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| // 12-note scales | ||
| { symbol: 'chromatic'}, | ||
| ] | ||
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| fs.ensureDirSync('./dist') | ||
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| generateScales('scales', notes, scaleTypesVariant1, 4, true) | ||
| generateScales('scales-without-title', notes, scaleTypesVariant1, 4, false) | ||
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| function generateScales(variantName: string, notes: string[], scaleTypes: ScaleInfo[], octave: number, writeTitle: boolean) { | ||
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| fs.ensureDirSync(`./dist/${variantName}`) | ||
| fs.emptyDirSync(`./dist/${variantName}`) | ||
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| for (const currentNote of notes) { | ||
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| for (const scaleInfo of scaleTypes) { | ||
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| const scaleSymbol = scaleInfo.symbol | ||
| const scaleFileName = scaleInfo.fileName != null ? scaleInfo.fileName : scaleSymbol | ||
| const scaleTitle = scaleInfo.title != null ? scaleInfo.title : scaleSymbol | ||
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| // Generate scale | ||
| const scale = Scale.get(`${currentNote}${noteOctave} ${scaleSymbol}`); | ||
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| console.log(' ') | ||
| console.log('---------------------------------------------------------------') | ||
| console.log(`${variantName}/${currentNote}${scaleFileName}.mid`, scale.aliases, scale.notes) | ||
| // console.debug(scale) | ||
| if (scale.empty) { | ||
| console.error(scale) | ||
| throw new Error(`Could not process scale alias: "${currentNote}${scaleSymbol}"`) | ||
| } | ||
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| // Create MIDI track | ||
| const track = new midiWriter.Track() | ||
| if (writeTitle) { | ||
| track.addTrackName(`${currentNote} ${scaleTitle}`) | ||
| } | ||
| track.addCopyright(`https://github.com/Fannon/midi-scale-pack`) | ||
| const note = new midiWriter.NoteEvent({pitch: scale.notes as midiWriter.Pitch[], duration: '1', velocity: 64 }); | ||
| track.addEvent(note); | ||
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| // Write to MIDI file | ||
| const filePath = `./dist/${variantName}/${scaleFileName}/${currentNote} ${scaleFileName}.mid` | ||
| const write = new midiWriter.Writer(track); | ||
| fs.ensureDirSync(`./dist/${variantName}/${scaleFileName}`) | ||
| fs.writeFileSync(filePath, write.buildFile()) | ||
| console.log(`Output: ${filePath}`) | ||
| console.log('---------------------------------------------------------------') | ||
| } | ||
| } | ||
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| } |