Created
February 9, 2019 19:26
-
-
Save wararyo/bd5ff242c6ee1ee9831d3e98f1206018 to your computer and use it in GitHub Desktop.
MIDIファイルをCHUNITHM.sunaba.txtで使える音楽データに変換します。
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var resolution = 192 // MIDIファイルの分解能 四分音符の長さ | |
var sunaba_spanY = 1152 // Sunabaでの一小節の長さ | |
var midiFileParser = require('midi-file-parser'); | |
var file = require('fs').readFileSync('Music2.mid', 'binary') | |
var midi = midiFileParser(file); | |
var Generate = function(noteList){ | |
//velからattenを計算 | |
noteList.forEach((note, i) => { | |
atten = Math.round(1000 / note.vel) | |
time = Math.round(note.time / resolution / 4 * sunaba_spanY) | |
console.log('addSoundNote('+note.ch+","+time+","+(note.noteNo-12)+","+atten+')') | |
}); | |
} | |
var noteList = []; | |
function Note(ch,time,noteNo,vel,duration){ | |
this.ch = ch | |
this.time = time | |
this.noteNo = noteNo | |
this.vel = vel | |
this.duration = duration | |
} | |
midi.tracks.forEach((trackData, i) => { | |
currentNoteNo = 0 | |
currentVelocity = 0 | |
currentDeltaTime = 0 | |
absoluteTime = 0 | |
trackData.forEach((event) => { | |
if(event.subtype == 'noteOn') { | |
if(currentNoteNo == 0) {//ノートオフの次にノート音が来てたら | |
currentNoteNo = event.noteNumber | |
currentVelocity = event.velocity | |
currentDeltaTime = event.deltaTime | |
absoluteTime += event.deltaTime | |
} | |
} | |
if(event.subtype == 'noteOff') { | |
if(currentNoteNo == event.noteNumber) {//ちゃんとノート音の直後に来てたら | |
//convertToSunaba(event.channel,absoluteTime,currentNoteNo,currentVelocity,event.deltaTime) | |
noteList.push(new Note(event.channel,absoluteTime,currentNoteNo,currentVelocity,event.deltaTime)); | |
currentNoteNo = 0 | |
currentVelocity = 0 | |
currentDeltaTime = 0 | |
absoluteTime += event.deltaTime | |
} | |
} | |
}); | |
}); | |
noteList.sort(function(a,b){ | |
return a.time - b.time; | |
}); | |
Generate(noteList) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment