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burns-audio-wam

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Collection of Web Audio Modules (WAMs) by Burns Audio

github.com/boourns/burns-audio-wam

boourns/burns-audio-wam

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/* * ATTENTION: The "eval" devtool has been used (maybe by default in mode: "development"). * This devtool is neither made for production nor for readable output files. * It uses "eval()" calls to create a separate source file in the browser devtools. * If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/) * or disable the default devtool with "devtool: false". * If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/). */ /******/ var __webpack_modules__ = ({ /***/ "../../../node_modules/preact/dist/preact.module.js": /*!**********************************************************!*\ !*** ../../../node_modules/preact/dist/preact.module.js ***! \**********************************************************/ /***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => { eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ 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target.cancelScheduledValues(at)\n startAmount.cancelScheduledValues(at)\n endAmount.cancelScheduledValues(at)\n\n endAmount.setValueAtTime(0, at)\n\n if (this.attack){\n target.setValueAtTime(0, at)\n target.linearRampToValueAtTime(1, at + this.attack)\n\n startAmount.setValueAtTime(1, at)\n startAmount.linearRampToValueAtTime(0, at + this.attack)\n } else {\n target.setValueAtTime(1, at)\n startAmount.setValueAtTime(0, at)\n }\n\n if (this.decay){\n target.setTargetAtTime(sustain, this._decayFrom, getTimeConstant(this.decay))\n }\n }\n },\n\n stop: {\n value: function(at, isTarget){\n if (isTarget){\n at = at - this.release\n }\n\n var endTime = at + this.release\n if (this.release){\n\n var target = this._multiplier.gain\n var startAmount = this._startAmount.gain\n var endAmount = this._endAmount.gain\n\n target.cancelScheduledValues(at)\n startAmount.cancelScheduledValues(at)\n endAmount.cancelScheduledValues(at)\n\n var expFalloff = getTimeConstant(this.release)\n\n // truncate attack (required as linearRamp is removed by cancelScheduledValues)\n if (this.attack && at < this._decayFrom){\n var valueAtTime = getValue(0, 1, this._startedAt, this._decayFrom, at)\n target.linearRampToValueAtTime(valueAtTime, at)\n startAmount.linearRampToValueAtTime(1-valueAtTime, at)\n startAmount.setTargetAtTime(0, at, expFalloff)\n }\n\n endAmount.setTargetAtTime(1, at, expFalloff)\n target.setTargetAtTime(0, at, expFalloff)\n }\n\n this._voltage.stop(endTime)\n return endTime\n }\n },\n\n onended: {\n get: function(){\n return this._voltage.onended\n },\n set: function(value){\n this._voltage.onended = value\n }\n }\n\n}\n\nvar flat = new Float32Array([1,1])\nfunction getVoltage(context){\n var voltage = context.createBufferSource()\n var buffer = context.createBuffer(1, 2, context.sampleRate)\n buffer.getChannelData(0).set(flat)\n voltage.buffer = buffer\n voltage.loop = true\n return voltage\n}\n\nfunction scale(node){\n var gain = node.context.createGain()\n node.connect(gain)\n return gain\n}\n\nfunction getTimeConstant(time){\n return Math.log(time+1)/Math.log(100)\n}\n\nfunction getValue(start, end, fromTime, toTime, at){\n var difference = end - start\n var time = toTime - fromTime\n var truncateTime = at - fromTime\n var phase = truncateTime / time\n var value = start + phase * difference\n\n if (value <= start) {\n value = start\n }\n if (value >= end) {\n value = end\n }\n\n return value\n}\n\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/adsr/index.js?"); /***/ }), /***/ "./node_modules/audio-loader/lib/base64.js": /*!*************************************************!*\ !*** ./node_modules/audio-loader/lib/base64.js ***! \*************************************************/ /***/ ((module) => { eval("\n\n// DECODE UTILITIES\nfunction b64ToUint6 (nChr) {\n return nChr > 64 && nChr < 91 ? nChr - 65\n : nChr > 96 && nChr < 123 ? nChr - 71\n : nChr > 47 && nChr < 58 ? nChr + 4\n : nChr === 43 ? 62\n : nChr === 47 ? 63\n : 0\n}\n\n// Decode Base64 to Uint8Array\n// ---------------------------\nfunction decode (sBase64, nBlocksSize) {\n var sB64Enc = sBase64.replace(/[^A-Za-z0-9\\+\\/]/g, '')\n var nInLen = sB64Enc.length\n var nOutLen = nBlocksSize\n ? Math.ceil((nInLen * 3 + 1 >> 2) / nBlocksSize) * nBlocksSize\n : nInLen * 3 + 1 >> 2\n var taBytes = new Uint8Array(nOutLen)\n\n for (var nMod3, nMod4, nUint24 = 0, nOutIdx = 0, nInIdx = 0; nInIdx < nInLen; nInIdx++) {\n nMod4 = nInIdx & 3\n nUint24 |= b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << 18 - 6 * nMod4\n if (nMod4 === 3 || nInLen - nInIdx === 1) {\n for (nMod3 = 0; nMod3 < 3 && nOutIdx < nOutLen; nMod3++, nOutIdx++) {\n taBytes[nOutIdx] = nUint24 >>> (16 >>> nMod3 & 24) & 255\n }\n nUint24 = 0\n }\n }\n return taBytes\n}\n\nmodule.exports = { decode: decode }\n\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/audio-loader/lib/base64.js?"); /***/ }), /***/ "./node_modules/audio-loader/lib/fetch.js": /*!************************************************!*\ !*** ./node_modules/audio-loader/lib/fetch.js ***! \************************************************/ /***/ ((module) => { eval("/* global XMLHttpRequest */\n\n\n/**\n * Given a url and a return type, returns a promise to the content of the url\n * Basically it wraps a XMLHttpRequest into a Promise\n *\n * @param {String} url\n * @param {String} type - can be 'text' or 'arraybuffer'\n * @return {Promise}\n */\nmodule.exports = function (url, type) {\n return new Promise(function (done, reject) {\n var req = new XMLHttpRequest()\n if (type) req.responseType = type\n\n req.open('GET', url)\n req.onload = function () {\n req.status === 200 ? done(req.response) : reject(Error(req.statusText))\n }\n req.onerror = function () { reject(Error('Network Error')) }\n req.send()\n })\n}\n\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/audio-loader/lib/fetch.js?"); /***/ }), /***/ "./node_modules/audio-loader/lib/index.js": /*!************************************************!*\ !*** ./node_modules/audio-loader/lib/index.js ***! \************************************************/ /***/ ((module, __unused_webpack_exports, __webpack_require__) => { eval("\n\nvar base64 = __webpack_require__(/*! ./base64 */ \"./node_modules/audio-loader/lib/base64.js\")\nvar fetch = __webpack_require__(/*! ./fetch */ \"./node_modules/audio-loader/lib/fetch.js\")\n\n// Given a regex, return a function that test if against a string\nfunction fromRegex (r) {\n return function (o) { return typeof o === 'string' && r.test(o) }\n}\n// Try to apply a prefix to a name\nfunction prefix (pre, name) {\n return typeof pre === 'string' ? pre + name\n : typeof pre === 'function' ? pre(name)\n : name\n}\n\n/**\n * Load one or more audio files\n *\n *\n * Possible option keys:\n *\n * - __from__ {Function|String}: a function or string to convert from file names to urls.\n * If is a string it will be prefixed to the name:\n * `load(ac, 'snare.mp3', { from: 'http://audio.net/samples/' })`\n * If it's a function it receives the file name and should return the url as string.\n * - __only__ {Array} - when loading objects, if provided, only the given keys\n * will be included in the decoded object:\n * `load(ac, 'piano.json', { only: ['C2', 'D2'] })`\n *\n * @param {AudioContext} ac - the audio context\n * @param {Object} source - the object to be loaded\n * @param {Object} options - (Optional) the load options for that object\n * @param {Object} defaultValue - (Optional) the default value to return as\n * in a promise if not valid loader found\n */\nfunction load (ac, source, options, defVal) {\n var loader =\n // Basic audio loading\n isArrayBuffer(source) ? loadArrayBuffer\n : isAudioFileName(source) ? loadAudioFile\n : isPromise(source) ? loadPromise\n // Compound objects\n : isArray(source) ? loadArrayData\n : isObject(source) ? loadObjectData\n : isJsonFileName(source) ? loadJsonFile\n // Base64 encoded audio\n : isBase64Audio(source) ? loadBase64Audio\n : isJsFileName(source) ? loadMidiJSFile\n : null\n\n var opts = options || {}\n return loader ? loader(ac, source, opts)\n : defVal ? Promise.resolve(defVal)\n : Promise.reject('Source not valid (' + source + ')')\n}\nload.fetch = fetch\n\n// BASIC AUDIO LOADING\n// ===================\n\n// Load (decode) an array buffer\nfunction isArrayBuffer (o) { return o instanceof ArrayBuffer }\nfunction loadArrayBuffer (ac, array, options) {\n return new Promise(function (done, reject) {\n ac.decodeAudioData(array,\n function (buffer) { done(buffer) },\n function () { reject(\"Can't decode audio data (\" + array.slice(0, 30) + '...)') }\n )\n })\n}\n\n// Load an audio filename\nvar isAudioFileName = fromRegex(/\\.(mp3|wav|ogg)(\\?.*)?$/i)\nfunction loadAudioFile (ac, name, options) {\n var url = prefix(options.from, name)\n return load(ac, load.fetch(url, 'arraybuffer'), options)\n}\n\n// Load the result of a promise\nfunction isPromise (o) { return o && typeof o.then === 'function' }\nfunction loadPromise (ac, promise, options) {\n return promise.then(function (value) {\n return load(ac, value, options)\n })\n}\n\n// COMPOUND OBJECTS\n// ================\n\n// Try to load all the items of an array\nvar isArray = Array.isArray\nfunction loadArrayData (ac, array, options) {\n return Promise.all(array.map(function (data) {\n return load(ac, data, options, data)\n }))\n}\n\n// Try to load all the values of a key/value object\nfunction isObject (o) { return o && typeof o === 'object' }\nfunction loadObjectData (ac, obj, options) {\n var dest = {}\n var promises = Object.keys(obj).map(function (key) {\n if (options.only && options.only.indexOf(key) === -1) return null\n var value = obj[key]\n return load(ac, value, options, value).then(function (audio) {\n dest[key] = audio\n })\n })\n return Promise.all(promises).then(function () { return dest })\n}\n\n// Load the content of a JSON file\nvar isJsonFileName = fromRegex(/\\.json(\\?.*)?$/i)\nfunction loadJsonFile (ac, name, options) {\n var url = prefix(options.from, name)\n return load(ac, load.fetch(url, 'text').then(JSON.parse), options)\n}\n\n// BASE64 ENCODED FORMATS\n// ======================\n\n// Load strings with Base64 encoded audio\nvar isBase64Audio = fromRegex(/^data:audio/)\nfunction loadBase64Audio (ac, source, options) {\n var i = source.indexOf(',')\n return load(ac, base64.decode(source.slice(i + 1)).buffer, options)\n}\n\n// Load .js files with MidiJS soundfont prerendered audio\nvar isJsFileName = fromRegex(/\\.js(\\?.*)?$/i)\nfunction loadMidiJSFile (ac, name, options) {\n var url = prefix(options.from, name)\n return load(ac, load.fetch(url, 'text').then(midiJsToJson), options)\n}\n\n// convert a MIDI.js javascript soundfont file to json\nfunction midiJsToJson (data) {\n var begin = data.indexOf('MIDI.Soundfont.')\n if (begin < 0) throw Error('Invalid MIDI.js Soundfont format')\n begin = data.indexOf('=', begin) + 2\n var end = data.lastIndexOf(',')\n return JSON.parse(data.slice(begin, end) + '}')\n}\n\nif ( true && module.exports) module.exports = load\nif (typeof window !== 'undefined') window.loadAudio = load\n\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/audio-loader/lib/index.js?"); /***/ }), /***/ "./node_modules/css-loader/dist/runtime/api.js": /*!*****************************************************!*\ !*** ./node_modules/css-loader/dist/runtime/api.js ***! \*****************************************************/ /***/ ((module) => { eval("\n\n/*\n MIT License http://www.opensource.org/licenses/mit-license.php\n Author Tobias Koppers @sokra\n*/\nmodule.exports = function (cssWithMappingToString) {\n var list = []; // return the list of modules as css string\n\n list.toString = function toString() {\n return this.map(function (item) {\n var content = \"\";\n var needLayer = typeof item[5] !== \"undefined\";\n\n if (item[4]) {\n content += \"@supports (\".concat(item[4], \") {\");\n }\n\n if (item[2]) {\n content += \"@media \".concat(item[2], \" {\");\n }\n\n if (needLayer) {\n content += \"@layer\".concat(item[5].length > 0 ? \" \".concat(item[5]) : \"\", \" {\");\n }\n\n content += cssWithMappingToString(item);\n\n if (needLayer) {\n content += \"}\";\n }\n\n if (item[2]) {\n content += \"}\";\n }\n\n if (item[4]) {\n content += \"}\";\n }\n\n return content;\n }).join(\"\");\n }; // import a list of modules into the list\n\n\n list.i = function i(modules, media, dedupe, supports, layer) {\n if (typeof modules === \"string\") {\n modules = [[null, modules, undefined]];\n }\n\n var alreadyImportedModules = {};\n\n if (dedupe) {\n for (var k = 0; k < this.length; k++) {\n var id = this[k][0];\n\n if (id != null) {\n alreadyImportedModules[id] = true;\n }\n }\n }\n\n for (var _k = 0; _k < modules.length; _k++) {\n var item = [].concat(modules[_k]);\n\n if (dedupe && alreadyImportedModules[item[0]]) {\n continue;\n }\n\n if (typeof layer !== \"undefined\") {\n if (typeof item[5] === \"undefined\") {\n item[5] = layer;\n } else {\n item[1] = \"@layer\".concat(item[5].length > 0 ? \" \".concat(item[5]) : \"\", \" {\").concat(item[1], \"}\");\n item[5] = layer;\n }\n }\n\n if (media) {\n if (!item[2]) {\n item[2] = media;\n } else {\n item[1] = \"@media \".concat(item[2], \" {\").concat(item[1], \"}\");\n item[2] = media;\n }\n }\n\n if (supports) {\n if (!item[4]) {\n item[4] = \"\".concat(supports);\n } else {\n item[1] = \"@supports (\".concat(item[4], \") {\").concat(item[1], \"}\");\n item[4] = supports;\n }\n }\n\n list.push(item);\n }\n };\n\n return list;\n};\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/css-loader/dist/runtime/api.js?"); /***/ }), /***/ "./node_modules/css-loader/dist/runtime/noSourceMaps.js": /*!**************************************************************!*\ !*** ./node_modules/css-loader/dist/runtime/noSourceMaps.js ***! \**************************************************************/ /***/ ((module) => { eval("\n\nmodule.exports = function (i) {\n return i[1];\n};\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/css-loader/dist/runtime/noSourceMaps.js?"); /***/ }), /***/ "./src/SoundfontView.scss": /*!********************************!*\ !*** ./src/SoundfontView.scss ***! \********************************/ /***/ ((module, __webpack_exports__, __webpack_require__) => { eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */ \"default\": () => (__WEBPACK_DEFAULT_EXPORT__)\n/* harmony export */ });\n/* harmony import */ var _node_modules_css_loader_dist_runtime_noSourceMaps_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../node_modules/css-loader/dist/runtime/noSourceMaps.js */ \"./node_modules/css-loader/dist/runtime/noSourceMaps.js\");\n/* harmony import */ var _node_modules_css_loader_dist_runtime_noSourceMaps_js__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_css_loader_dist_runtime_noSourceMaps_js__WEBPACK_IMPORTED_MODULE_0__);\n/* harmony import */ var _node_modules_css_loader_dist_runtime_api_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../node_modules/css-loader/dist/runtime/api.js */ \"./node_modules/css-loader/dist/runtime/api.js\");\n/* harmony import */ var _node_modules_css_loader_dist_runtime_api_js__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(_node_modules_css_loader_dist_runtime_api_js__WEBPACK_IMPORTED_MODULE_1__);\n// Imports\n\n\nvar ___CSS_LOADER_EXPORT___ = _node_modules_css_loader_dist_runtime_api_js__WEBPACK_IMPORTED_MODULE_1___default()((_node_modules_css_loader_dist_runtime_noSourceMaps_js__WEBPACK_IMPORTED_MODULE_0___default()));\n// Module\n___CSS_LOADER_EXPORT___.push([module.id, \".ComponentWrapper {\\n display: flex;\\n flex-direction: column;\\n align-items: center;\\n text-align: center;\\n flex: 1;\\n padding: 4px;\\n}\\n\\n.Fader {\\n margin-top: auto;\\n display: flex;\\n flex-direction: column;\\n}\\n\\n.Knob {\\n margin-top: auto;\\n display: flex;\\n flex-direction: column;\\n}\\n\\n.ComponentSelect {\\n margin-bottom: auto;\\n margin-top: auto;\\n margin-bottom: auto;\\n display: flex;\\n flex-direction: column;\\n}\\n\\n.GlowModalBackdrop {\\n position: fixed;\\n top: 0;\\n bottom: 0;\\n left: 0;\\n right: 0;\\n background-color: rgba(0, 0, 0, 0.3);\\n padding: 50px;\\n z-index: 99999998;\\n}\\n\\n.GlowModalContainer {\\n position: fixed;\\n top: 50%;\\n left: 50%;\\n transform: translate(-50%, -50%);\\n margin: 0 auto;\\n z-index: 99999998;\\n}\\n\\n.nbPWZwipzoqg5B92YbCm {\\n flex: 1;\\n background-color: #292a30;\\n display: flex;\\n flex-direction: column;\\n justify-content: space-between;\\n padding: 10px;\\n color: white;\\n font-family: var(--var-FontFamily, system-ui, -apple-system, \\\"Segoe UI\\\", Roboto, \\\"Helvetica Neue\\\", \\\"Noto Sans\\\", \\\"Liberation Sans\\\", Arial, sans-serif, \\\"Apple Color Emoji\\\", \\\"Segoe UI Emoji\\\", \\\"Segoe UI Symbol\\\", \\\"Noto Color Emoji\\\");\\n}\\n\\n.M18k4HOZoaKdrv9CQMkg {\\n /* border: 1px solid white; */\\n border: 1px solid rgba(0, 0, 0, 0.3);\\n border-radius: 2px;\\n margin: 5px;\\n display: flex;\\n flex-direction: column;\\n}\", \"\"]);\n// Exports\n___CSS_LOADER_EXPORT___.locals = {\n\t\"module\": \"nbPWZwipzoqg5B92YbCm\",\n\t\"section\": \"M18k4HOZoaKdrv9CQMkg\"\n};\n/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (___CSS_LOADER_EXPORT___);\n\n\n//# sourceURL=webpack://soundfont-wam/./src/SoundfontView.scss?"); /***/ }), /***/ "./node_modules/midimessage/dist/index.min.js": /*!****************************************************!*\ !*** ./node_modules/midimessage/dist/index.min.js ***! \****************************************************/ /***/ ((module) => { eval("(function(e){if(true){module.exports=e()}else { var t; }})(function(){var e,t,s;return function o(e,t,s){function a(n,i){if(!t[n]){if(!e[n]){var l=undefined;if(!i&&l)return require(n,!0);if(r)return r(n,!0);var h=new Error(\"Cannot find module '\"+n+\"'\");throw h.code=\"MODULE_NOT_FOUND\",h}var c=t[n]={exports:{}};e[n][0].call(c.exports,function(t){var s=e[n][1][t];return a(s?s:t)},c,c.exports,o,e,t,s)}return t[n].exports}var r=undefined;for(var n=0;n<s.length;n++)a(s[n]);return a}({1:[function(e,t,s){\"use strict\";Object.defineProperty(s,\"__esModule\",{value:true});s[\"default\"]=function(e){function t(e){this._event=e;this._data=e.data;this.receivedTime=e.receivedTime;if(this._data&&this._data.length<2){console.warn(\"Illegal MIDI message of length\",this._data.length);return}this._messageCode=e.data[0]&240;this.channel=e.data[0]&15;switch(this._messageCode){case 128:this.messageType=\"noteoff\";this.key=e.data[1]&127;this.velocity=e.data[2]&127;break;case 144:this.messageType=\"noteon\";this.key=e.data[1]&127;this.velocity=e.data[2]&127;break;case 160:this.messageType=\"keypressure\";this.key=e.data[1]&127;this.pressure=e.data[2]&127;break;case 176:this.messageType=\"controlchange\";this.controllerNumber=e.data[1]&127;this.controllerValue=e.data[2]&127;if(this.controllerNumber===120&&this.controllerValue===0){this.channelModeMessage=\"allsoundoff\"}else if(this.controllerNumber===121){this.channelModeMessage=\"resetallcontrollers\"}else if(this.controllerNumber===122){if(this.controllerValue===0){this.channelModeMessage=\"localcontroloff\"}else{this.channelModeMessage=\"localcontrolon\"}}else if(this.controllerNumber===123&&this.controllerValue===0){this.channelModeMessage=\"allnotesoff\"}else if(this.controllerNumber===124&&this.controllerValue===0){this.channelModeMessage=\"omnimodeoff\"}else if(this.controllerNumber===125&&this.controllerValue===0){this.channelModeMessage=\"omnimodeon\"}else if(this.controllerNumber===126){this.channelModeMessage=\"monomodeon\"}else if(this.controllerNumber===127){this.channelModeMessage=\"polymodeon\"}break;case 192:this.messageType=\"programchange\";this.program=e.data[1];break;case 208:this.messageType=\"channelpressure\";this.pressure=e.data[1]&127;break;case 224:this.messageType=\"pitchbendchange\";var t=e.data[2]&127;var s=e.data[1]&127;this.pitchBend=(t<<8)+s;break}}return new t(e)};t.exports=s[\"default\"]},{}]},{},[1])(1)});\n//# sourceMappingURL=dist/index.js.map\n\n//# sourceURL=webpack://soundfont-wam/./node_modules/midimessage/dist/index.min.js?"); /***/ }), /***/ "./node_modules/note-parser/index.js": /*!*******************************************!*\ !*** ./node_modules/note-parser/index.js ***! \*******************************************/ /***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => { eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */ acc: () => (/* binding */ acc),\n/* harmony export */ alt: () => (/* binding */ alt),\n/* harmony export */ build: () => (/* binding */ build),\n/* harmony export */ chroma: () => (/* binding */ chroma),\n/* harmony export */ freq: () => (/* binding */ freq),\n/* harmony export */ letter: () => (/* binding */ letter),\n/* harmony export */ midi: () => (/* binding */ midi),\n/* harmony export */ oct: () => (/* binding */ oct),\n/* harmony export */ parse: () => (/* binding */ parse),\n/* harmony export */ pc: () => (/* binding */ pc),\n/* harmony export */ regex: () => (/* binding */ regex),\n/* harmony export */ step: () => (/* binding */ step)\n/* harmony export */ });\n\n\n// util\nfunction fillStr (s, num) { return Array(num + 1).join(s) }\nfunction isNum (x) { return typeof x === 'number' }\nfunction isStr (x) { return typeof x === 'string' }\nfunction isDef (x) { return typeof x !== 'undefined' }\nfunction midiToFreq (midi, tuning) {\n return Math.pow(2, (midi - 69) / 12) * (tuning || 440)\n}\n\nvar REGEX = /^([a-gA-G])(#{1,}|b{1,}|x{1,}|)(-?\\d*)\\s*(.*)\\s*$/\n/**\n * A regex for matching note strings in scientific notation.\n *\n * @name regex\n * @function\n * @return {RegExp} the regexp used to parse the note name\n *\n * The note string should have the form `letter[accidentals][octave][element]`\n * where:\n *\n * - letter: (Required) is a letter from A to G either upper or lower case\n * - accidentals: (Optional) can be one or more `b` (flats), `#` (sharps) or `x` (double sharps).\n * They can NOT be mixed.\n * - octave: (Optional) a positive or negative integer\n * - element: (Optional) additionally anything after the duration is considered to\n * be the element name (for example: 'C2 dorian')\n *\n * The executed regex contains (by array index):\n *\n * - 0: the complete string\n * - 1: the note letter\n * - 2: the optional accidentals\n * - 3: the optional octave\n * - 4: the rest of the string (trimmed)\n *\n * @example\n * var parser = require('note-parser')\n * parser.regex.exec('c#4')\n * // => ['c#4', 'c', '#', '4', '']\n * parser.regex.exec('c#4 major')\n * // => ['c#4major', 'c', '#', '4', 'major']\n * parser.regex().exec('CMaj7')\n * // => ['CMaj7', 'C', '', '', 'Maj7']\n */\nfunction regex () { return REGEX }\n\nvar SEMITONES = [0, 2, 4, 5, 7, 9, 11]\n/**\n * Parse a note name in scientific notation an return it's components,\n * and some numeric properties including midi number and frequency.\n *\n * @name parse\n * @function\n * @param {String} note - the note string to be parsed\n * @param {Boolean} isTonic - true the strings it's supposed to contain a note number\n * and some category (for example an scale: 'C# major'). It's false by default,\n * but when true, en extra tonicOf property is returned with the category ('major')\n * @param {Float} tunning - The frequency of A4 note to calculate frequencies.\n * By default it 440.\n * @return {Object} the parsed note name or null if not a valid note\n *\n * The parsed note name object will ALWAYS contains:\n * - letter: the uppercase letter of the note\n * - acc: the accidentals of the note (only sharps or flats)\n * - pc: the pitch class (letter + acc)\n * - step: s a numeric representation of the letter. It's an integer from 0 to 6\n * where 0 = C, 1 = D ... 6 = B\n * - alt: a numeric representation of the accidentals. 0 means no alteration,\n * positive numbers are for sharps and negative for flats\n * - chroma: a numeric representation of the pitch class. It's like midi for\n * pitch classes. 0 = C, 1 = C#, 2 = D ... 11 = B. Can be used to find enharmonics\n * since, for example, chroma of 'Cb' and 'B' are both 11\n *\n * If the note has octave, the parser object will contain:\n * - oct: the octave number (as integer)\n * - midi: the midi number\n * - freq: the frequency (using tuning parameter as base)\n *\n * If the parameter `isTonic` is set to true, the parsed object will contain:\n * - tonicOf: the rest of the string that follows note name (left and right trimmed)\n *\n * @example\n * var parse = require('note-parser').parse\n * parse('Cb4')\n * // => { letter: 'C', acc: 'b', pc: 'Cb', step: 0, alt: -1, chroma: -1,\n * oct: 4, midi: 59, freq: 246.94165062806206 }\n * // if no octave, no midi, no freq\n * parse('fx')\n * // => { letter: 'F', acc: '##', pc: 'F##', step: 3, alt: 2, chroma: 7 })\n */\nfunction parse (str, isTonic, tuning) {\n if (typeof str !== 'string') return null\n var m = REGEX.exec(str)\n if (!m || (!isTonic && m[4])) return null\n\n var p = { letter: m[1].toUpperCase(), acc: m[2].replace(/x/g, '##') }\n p.pc = p.letter + p.acc\n p.step = (p.letter.charCodeAt(0) + 3) % 7\n p.alt = p.acc[0] === 'b' ? -p.acc.length : p.acc.length\n var pos = SEMITONES[p.step] + p.alt\n p.chroma = pos < 0 ? 12 + pos : pos % 12\n if (m[3]) { // has octave\n p.oct = +m[3]\n p.midi = pos + 12 * (p.oct + 1)\n p.freq = midiToFreq(p.midi, tuning)\n }\n if (isTonic) p.tonicOf = m[4]\n return p\n}\n\nvar LETTERS = 'CDEFGAB'\nfunction accStr (n) { return !isNum(n) ? '' : n < 0 ? fillStr('b', -n) : fillStr('#', n) }\nfunction octStr (n) { return !isNum(n) ? '' : '' + n }\n\n/**\n * Create a string from a parsed object or `step, alteration, octave` parameters\n * @param {Object} obj - the parsed data object\n * @return {String} a note string or null if not valid parameters\n * @since 1.2\n * @example\n * parser.build(parser.parse('cb2')) // => 'Cb2'\n *\n * @example\n * // it accepts (step, alteration, octave) parameters:\n * parser.build(3) // => 'F'\n * parser.build(3, -1) // => 'Fb'\n * parser.build(3, -1, 4) // => 'Fb4'\n */\nfunction build (s, a, o) {\n if (s === null || typeof s === 'undefined') return null\n if (s.step) return build(s.step, s.alt, s.oct)\n if (s < 0 || s > 6) return null\n return LETTERS.charAt(s) + accStr(a) + octStr(o)\n}\n\n/**\n * Get midi of a note\n *\n * @name midi\n * @function\n * @param {String|Integer} note - the note name or midi number\n * @return {Integer} the midi number of the note or null if not a valid note\n * or the note does NOT contains octave\n * @example\n * var parser = require('note-parser')\n * parser.midi('A4') // => 69\n * parser.midi('A') // => null\n * @example\n * // midi numbers are bypassed (even as strings)\n * parser.midi(60) // => 60\n * parser.midi('60') // => 60\n */\nfunction midi (note) {\n if ((isNum(note) || isStr(note)) && note >= 0 && note < 128) return +note\n var p = parse(note)\n return p && isDef(p.midi) ? p.midi : null\n}\n\n/**\n * Get freq of a note in hertzs (in a well tempered 440Hz A4)\n *\n * @name freq\n * @function\n * @param {String} note - the note name or note midi number\n * @param {String} tuning - (Optional) the A4 frequency (440 by default)\n * @return {Float} the freq of the number if hertzs or null if not valid note\n * @example\n * var parser = require('note-parser')\n * parser.freq('A4') // => 440\n * parser.freq('A') // => null\n * @example\n * // can change tuning (440 by default)\n * parser.freq('A4', 444) // => 444\n * parser.freq('A3', 444) // => 222\n * @example\n * // it accepts midi numbers (as 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