Music to numbers #260
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| (async function(Scratch) { | ||
| const variables = { | ||
| volume: 1.0, | ||
| pitchShift: 0, | ||
| leftRightValue: 0, | ||
| selectedEffect: "none", | ||
| isPlaying: false, | ||
| instrument: "sine", | ||
| instrumentID: 0, | ||
| instrumentName: "without instrument", | ||
| pauseDuration: 0.5 | ||
| }; | ||
|
|
||
| class MusicGenerator { | ||
| constructor() { | ||
| this.audioContext = new (window.AudioContext || window.webkitAudioContext)(); | ||
| this.digitToFrequency = { | ||
| "0": 261.63, // C4 | ||
| "1": 293.66, // D4 | ||
| "2": 329.63, // E4 | ||
| "3": 349.23, // F4 | ||
| "4": 392.00, // G4 | ||
| "5": 440.00, // A4 | ||
| "6": 493.88, // B4 | ||
| "7": 523.25, // C5 | ||
| "8": 587.33, // D5 | ||
| "9": 659.25 // E5 | ||
| }; | ||
| this.activeOscillators = []; | ||
| } | ||
|
|
||
| getFrequencyWithEffect(frequency) { | ||
| if (variables.selectedEffect === "pitch") { | ||
| return frequency * Math.pow(2, variables.pitchShift / 12); | ||
| } | ||
| return frequency; | ||
| } | ||
|
|
||
| playContinuousSequence(sequence, noteDuration = 0.3) { | ||
| let currentTime = this.audioContext.currentTime; | ||
| variables.isPlaying = true; | ||
|
|
||
| sequence.split('').forEach((char) => { | ||
| if (this.digitToFrequency[char] !== undefined) { | ||
| const frequency = this.getFrequencyWithEffect(this.digitToFrequency[char]); | ||
| this.playNoteAtTime(frequency, currentTime, noteDuration); | ||
| currentTime += noteDuration; | ||
| } else if (char === ' ' || char === '_' || char === '.') { | ||
| currentTime += variables.pauseDuration; | ||
| } | ||
| }); | ||
|
|
||
| setTimeout(() => { variables.isPlaying = false; }, (currentTime - this.audioContext.currentTime) * 1000); | ||
| } | ||
|
|
||
| playNoteAtTime(frequency, startTime, duration) { | ||
| const oscillator = this.audioContext.createOscillator(); | ||
| oscillator.type = variables.instrument; | ||
| oscillator.frequency.setValueAtTime(frequency, startTime); | ||
|
|
||
| const gainNode = this.audioContext.createGain(); | ||
| gainNode.gain.setValueAtTime(variables.volume * 0.1, startTime); | ||
|
|
||
| let panNode; | ||
| if (variables.selectedEffect === "left-right") { | ||
| panNode = this.audioContext.createStereoPanner(); | ||
| panNode.pan.setValueAtTime(variables.leftRightValue, startTime); | ||
| oscillator.connect(panNode); | ||
| panNode.connect(gainNode); | ||
| } else { | ||
| oscillator.connect(gainNode); | ||
| } | ||
|
|
||
| gainNode.connect(this.audioContext.destination); | ||
| oscillator.start(startTime); | ||
| oscillator.stop(startTime + duration); | ||
| this.activeOscillators.push(oscillator); | ||
| } | ||
|
|
||
| stopAllMusic() { | ||
| this.activeOscillators.forEach(oscillator => oscillator.stop()); | ||
| this.activeOscillators = []; | ||
| variables.isPlaying = false; | ||
| } | ||
| } | ||
|
|
||
| const musicGen = new MusicGenerator(); | ||
|
|
||
| const extension = { | ||
| getInfo() { | ||
| return { | ||
| blockIconURI: "data:image/png;base64,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", | ||
| id: "musicDigitGenerator", | ||
|
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||
| name: "Music to Numbers", | ||
| color1: "#0088ff", | ||
| color2: "#0063ba", | ||
| blocks: [ | ||
| { | ||
| opcode: 'playDigitSequence', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'play note sequence for [sequence]', | ||
| arguments: { | ||
| sequence: { | ||
| type: Scratch.ArgumentType.STRING, | ||
| defaultValue: '1 2 3 . 4 _ 5' | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'setVolume', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'set volume to [volume] (1-100)', | ||
| arguments: { | ||
| volume: { | ||
| type: Scratch.ArgumentType.NUMBER, | ||
| defaultValue: 100 | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'setEffect', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'set [effectType] effect value to [value]', | ||
| arguments: { | ||
| effectType: { | ||
| type: Scratch.ArgumentType.STRING, | ||
| menu: 'effectTypes', | ||
| defaultValue: 'pitch' | ||
| }, | ||
| value: { | ||
| type: Scratch.ArgumentType.NUMBER, | ||
| defaultValue: 0 | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'changeEffect', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'change [effectType] effect by [amount]', | ||
| arguments: { | ||
| effectType: { | ||
| type: Scratch.ArgumentType.STRING, | ||
| menu: 'effectTypes', | ||
| defaultValue: 'pitch' | ||
| }, | ||
| amount: { | ||
| type: Scratch.ArgumentType.NUMBER, | ||
| defaultValue: 1 | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'getCurrentEffect', | ||
| blockType: Scratch.BlockType.REPORTER, | ||
| text: 'current [effectType] effect', | ||
| arguments: { | ||
| effectType: { | ||
| type: Scratch.ArgumentType.STRING, | ||
| menu: 'effectTypes', | ||
| defaultValue: 'pitch' | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'setPauseDuration', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'set pause to [duration] seconds', | ||
| arguments: { | ||
| duration: { | ||
| type: Scratch.ArgumentType.NUMBER, | ||
| defaultValue: 0.5 | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'changePauseDuration', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'change pause by [amount] seconds', | ||
| arguments: { | ||
| amount: { | ||
| type: Scratch.ArgumentType.NUMBER, | ||
| defaultValue: 0.1 | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'getCurrentPause', | ||
| blockType: Scratch.BlockType.REPORTER, | ||
| text: 'current pause duration', | ||
| }, | ||
| { | ||
| opcode: 'setInstrument', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'set instrument to [instrument]', | ||
| arguments: { | ||
| instrument: { | ||
| type: Scratch.ArgumentType.STRING, | ||
| menu: 'instruments', | ||
| defaultValue: 'without instrument' | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'getCurrentInstrument', | ||
| blockType: Scratch.BlockType.REPORTER, | ||
| text: 'current instrument [returnType]', | ||
| arguments: { | ||
| returnType: { | ||
| type: Scratch.ArgumentType.STRING, | ||
| menu: 'returnTypes', | ||
| defaultValue: 'name' | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| opcode: 'isMusicPlaying', | ||
| blockType: Scratch.BlockType.BOOLEAN, | ||
| text: 'music playing now?' | ||
| }, | ||
| { | ||
| opcode: 'stopMusic', | ||
| blockType: Scratch.BlockType.COMMAND, | ||
| text: 'stop music' | ||
| } | ||
| ], | ||
| menus: { | ||
| effectTypes: { | ||
| acceptReporters: true, | ||
| items: ['pitch', 'left-right'] | ||
| }, | ||
| instruments: { | ||
| acceptReporters: true, | ||
| items: ['without instrument', 'piano', 'organ'] | ||
| }, | ||
| returnTypes: { | ||
| acceptReporters: true, | ||
| items: ['name', 'number'] | ||
| } | ||
| } | ||
| }; | ||
| }, | ||
|
|
||
| playDigitSequence(args) { | ||
| const sequence = args.sequence; | ||
| musicGen.playContinuousSequence(sequence); | ||
| }, | ||
|
|
||
| setVolume(args) { | ||
| variables.volume = Math.max(0, Math.min(1, args.volume / 100)); | ||
| }, | ||
|
|
||
| setEffect(args) { | ||
| variables.selectedEffect = args.effectType; | ||
| if (args.effectType === "pitch") { | ||
| variables.pitchShift = args.value; | ||
| } else if (args.effectType === "left-right") { | ||
| variables.leftRightValue = Math.max(-1, Math.min(1, args.value)); | ||
| } | ||
| }, | ||
|
|
||
| changeEffect(args) { | ||
| if (args.effectType === "pitch") { | ||
| variables.pitchShift += args.amount; | ||
| } else if (args.effectType === "left-right") { | ||
| variables.leftRightValue = Math.max(-1, Math.min(1, variables.leftRightValue + args.amount)); | ||
| } | ||
| }, | ||
|
|
||
| getCurrentEffect(args) { | ||
| if (args.effectType === "pitch") { | ||
| return variables.pitchShift; | ||
| } else if (args.effectType === "left-right") { | ||
| return variables.leftRightValue; | ||
| } | ||
| return 0; | ||
| }, | ||
|
|
||
| setPauseDuration(args) { | ||
| variables.pauseDuration = Math.max(0, args.duration); | ||
| }, | ||
|
|
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| changePauseDuration(args) { | ||
| variables.pauseDuration = Math.max(0, variables.pauseDuration + args.amount); | ||
| }, | ||
|
|
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| getCurrentPause() { | ||
| return variables.pauseDuration; | ||
| }, | ||
|
|
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| getCurrentInstrument(args) { | ||
| return args.returnType === "name" ? variables.instrumentName : variables.instrumentID; | ||
| }, | ||
|
|
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| setInstrument(args) { | ||
| switch (args.instrument) { | ||
| case 'piano': | ||
| variables.instrument = 'triangle'; | ||
| variables.instrumentID = 1; | ||
| variables.instrumentName = 'piano'; | ||
| break; | ||
| case 'organ': | ||
| variables.instrument = 'square'; | ||
| variables.instrumentID = 2; | ||
| variables.instrumentName = 'organ'; | ||
| break; | ||
| default: | ||
| variables.instrument = 'sine'; | ||
| variables.instrumentID = 0; | ||
| variables.instrumentName = 'without instrument'; | ||
| } | ||
| }, | ||
|
|
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| isMusicPlaying() { | ||
| return variables.isPlaying; | ||
| }, | ||
|
|
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| stopMusic() { | ||
| musicGen.stopAllMusic(); | ||
| } | ||
| }; | ||
|
|
||
| Scratch.extensions.register(extension); | ||
| })(Scratch); | ||
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make sure to register this audioContext to PM.
you'll need to connect stuff that originally connects to
audioContext.destinationto a main gain node that is connected toaudioContext.destination, you already make gain nodes for playing notes so you can just make a main gain node hereyou can then register the context with this function:
make sure to replace EXTENSION_ID with your extension's ID.
this will make the pause button and volume slider work with the extension, and future addons or extensions will be able to modify it if needed