commit b0cb3950faaf8cf4af6ea60af53de1255c8e8249
Author: Eric Rosenbaum <eric.rosenbaum@gmail.com>
Date: Thu Oct 13 14:54:07 2016 -0400
initial commit
diff --git a/.editorconfig b/.editorconfig
new file mode 100644
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--- /dev/null
+++ b/.editorconfig
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+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.{js,html}]
+indent_style = space
diff --git a/.eslintignore b/.eslintignore
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--- /dev/null
+++ b/.eslintignore
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+node_modules/*
+dist.js
diff --git a/.eslintrc b/.eslintrc
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+++ b/.eslintrc
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+{
+ "parser": "babel-eslint",
+ "rules": {
+ "curly": [2, "multi-line"],
+ "eol-last": [2],
+ "indent": [2, 4],
+ "linebreak-style": [2, "unix"],
+ "max-len": [2, 120, 4],
+ "no-trailing-spaces": [2, { "skipBlankLines": true }],
+ "no-unused-vars": [2, {"args": "after-used", "varsIgnorePattern": "^_"}],
+ "quotes": [2, "single"],
+ "semi": [2, "always"],
+ "space-before-function-paren": [2, "always"],
+ "strict": [2, "never"]
+ },
+ "env": {
+ "browser": true,
+ "es6": true,
+ "node": true
+ },
+ "extends": ["eslint:recommended"]
+}
diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+# Mac OS
+.DS_Store
+
+# NPM
+/node_modules
+npm-*
+
+# Testing
+/.nyc_output
+/coverage
+
+/dist.js
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..d305b94
--- /dev/null
+++ b/.travis.yml
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+language: node_js
+node_js:
+- '4.2'
+- 'stable'
+cache:
+ directories:
+ - node_modules
diff --git a/package.json b/package.json
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--- /dev/null
+++ b/package.json
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+{
+ "name": "scratch-audioengine",
+ "version": "0.1.0",
+ "description": "audio engine for scratch 3.0",
+ "main": "dist.js",
+ "scripts": {
+ "test": "npm run lint && npm run build",
+ "build": "webpack --bail",
+ "watch": "webpack --watch",
+ "lint": "eslint ."
+ },
+ "repository": {
+ "type": "git",
+ "url": "git+https://github.com/LLK/scratch-audioengine.git"
+ },
+ "author": "Massachusetts Institute of Technology",
+ "license": "BSD-3-Clause",
+ "bugs": {
+ "url": "https://github.com/LLK/scratch-audioengine/issues"
+ },
+ "homepage": "https://github.com/LLK/scratch-audioengine#readme",
+ "devDependencies": {
+ "babel-core": "^6.17.0",
+ "babel-eslint": "^7.0.0",
+ "babel-loader": "^6.2.5",
+ "babel-preset-es2015": "^6.16.0",
+ "eslint": "^3.7.1",
+ "soundfont-player": "^0.10.5",
+ "tone": "^0.8.0",
+ "webpack": "^1.13.2"
+ }
+}
diff --git a/src/index.js b/src/index.js
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index 0000000..13b3106
--- /dev/null
+++ b/src/index.js
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+var Tone = require('tone');
+var Soundfont = require('soundfont-player');
+
+function AudioEngine () {
+
+ // tone setup
+
+ this.tone = new Tone();
+
+ // effects setup
+
+ this.delay = new Tone.FeedbackDelay(0.25, 0.5);
+ this.panner = new Tone.Panner();
+ this.reverb = new Tone.Freeverb();
+
+ this.clearEffects();
+
+ Tone.Master.chain(this.delay, this.panner, this.reverb);
+
+ // drum sounds
+
+ // var drumFileNames = ['high_conga', 'small_cowbell',
+ // 'snare_drum', 'splash cymbal'];
+ // this.drumSamplers = this._loadSoundFiles(drumFileNames);
+
+ // sound urls - map each url to its tone.sampler
+ this.soundSamplers = [];
+
+ // soundfont setup
+
+ // instrument names used by Musyng Kite soundfont, in order to
+ // match scratch instruments
+ this.instrumentNames = ['acoustic_grand_piano', 'electric_piano_1',
+ 'drawbar_organ', 'acoustic_guitar_nylon', 'electric_guitar_clean',
+ 'acoustic_bass', 'pizzicato_strings', 'cello', 'trombone', 'clarinet'];
+
+ Soundfont.instrument(Tone.context, this.instrumentNames[0]).then(
+ function (inst) {
+ this.instrument = inst;
+ this.instrument.connect(Tone.Master);
+ }.bind(this)
+ );
+}
+
+AudioEngine.prototype.playSound = function (soundNum) {
+ this.soundSamplers[soundNum].triggerAttack();
+};
+
+AudioEngine.prototype.playSoundFromUrl = function (url) {
+ if (url) {
+ // if we've loaded it already, play it
+ if (this.soundSamplers[url]) {
+ // this.soundSamplers[url].triggerAttack();
+ this.soundSamplers[url].player.start();
+ } else {
+ // else load, play, and store it
+ // this results in a delay the first time you play the sound
+ var sampler = new Tone.Sampler(url, function () {
+ sampler.triggerAttack();
+ this.soundSamplers[url] = sampler;
+ }.bind(this)).toMaster();
+ }
+ }
+};
+
+AudioEngine.prototype.getSoundDuration = function (url) {
+ return this.soundSamplers[url].player.buffer.duration;
+};
+
+AudioEngine.prototype.playNoteForBeats = function (note, beats) {
+ this.instrument.play(
+ note, Tone.context.currentTime, {duration : Number(beats)}
+ );
+};
+
+AudioEngine.prototype.playDrumForBeats = function (drumNum) {
+ this.drumSamplers[drumNum].triggerAttack();
+};
+
+AudioEngine.prototype.stopAllSounds = function () {
+ // stop drum notes
+ // for (var i = 0; i<this.drumSamplers.length; i++) {
+ // this.drumSamplers[i].triggerRelease();
+ // }
+ // stop sounds triggered with playSound (indexed by their urls)
+ for (var key in this.soundSamplers) {
+ this.soundSamplers[key].triggerRelease();
+ }
+ // stop soundfont notes
+ this.instrument.stop();
+};
+
+AudioEngine.prototype.setEffect = function (effect, value) {
+ switch (effect) {
+ case 'ECHO':
+ this.delay.wet.value = (value / 100) / 2; // max 50% wet
+ break;
+ case 'PAN':
+ this.panner.pan.value = value / 100;
+ break;
+ case 'REVERB':
+ this.reverb.wet.value = value / 100;
+ break;
+ case 'PITCH':
+ this._setPitchShift(value / 20);
+ break;
+ }
+};
+
+AudioEngine.prototype.changeEffect = function (effect, value) {
+ switch (effect) {
+ case 'ECHO':
+ this.delay.wet.value += (value / 100) / 2; // max 50% wet
+ this.delay.wet.value = this._clamp(this.delay.wet.value, 0, 0.5);
+ break;
+ case 'PAN':
+ this.panner.pan.value += value / 100;
+ this.panner.pan.value = this._clamp(this.panner.pan.value, -1, 1);
+ break;
+ case 'REVERB':
+ this.reverb.wet.value += value / 100;
+ this.reverb.wet.value = this._clamp(this.reverb.wet.value, 0, 1);
+ break;
+ case 'PITCH':
+ // this.pitchShift.pitch += value / 20;
+ break;
+ }
+};
+
+AudioEngine.prototype._setPitchShift = function (value) {
+ for (var i in this.soundSamplers) {
+ this.soundSamplers[i].player.playbackRate = 1 + value;
+ }
+};
+
+AudioEngine.prototype.clearEffects = function () {
+ this.delay.wet.value = 0;
+ this._setPitchShift(0);
+ this.panner.pan.value = 0;
+ this.reverb.wet.value = 0;
+};
+
+// AudioEngine.prototype.loadSoundFromUrl = function(url) {
+
+// };
+
+AudioEngine.prototype.loadSounds = function (sounds) {
+ for (var sound in sounds) {
+ var sampler = new Tone.Sampler(sound.fileUrl).toMaster();
+ this.soundSamplers[sound.fileUrl] = sampler;
+ }
+};
+
+AudioEngine.prototype._clamp = function (input, min, max) {
+ return Math.min(Math.max(input, min), max);
+};
+
+module.exports = AudioEngine;
+
diff --git a/webpack.config.js b/webpack.config.js
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+++ b/webpack.config.js
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+var path = require('path');
+
+module.exports = {
+ entry: {
+ 'dist': './src/index.js'
+ },
+ output: {
+ path: __dirname,
+ library: 'AudioEngine',
+ libraryTarget: 'commonjs2',
+ filename: '[name].js'
+ },
+ module: {
+ loaders: [{
+ test: /\.js$/,
+ loader: 'babel-loader',
+ include: path.resolve(__dirname, 'src'),
+ query: {
+ presets: ['es2015']
+ }
+ }]
+ }
+};