index.js

var Context = typeof webkitAudioContext == 'undefined' 
            ? AudioContext 
            : webkitAudioContext
var master = new Context
var jsynth = require('jsynth')
var tune = require('tune')

var ff = [];
[
  'C D E G',
  'A B C E',
  'C D E G',
  'A B C E',
  'A C F G',
  'A B D G',
  'Ab C Eb G',
  'A Bb D F',
].forEach(function(chord) {
  chord = chord.split(' ')
  var oct = 2, arp = [];
  for (var i = 0; i < (chord.length - 1) * 6; i++) {
    if (i % 4 === 0) oct++
    arp.push(chord[i % 4] + oct)
  }
  ff = ff.concat(arp.concat(arp.slice(0, -1).reverse()))
});
ff = tune(ff)

var synth = jsynth(master, function(t) {
  return ff(t * 2)
})
synth.connect(master.destination)

minified.js

require=function(e,t,n){function r(n,o){if(!t[n]){if(!e[n]){var s="function"==typeof require&&require;if(!o&&s)return s(n,!0);if(i)return i(n,!0);throw Error("Cannot find module '"+n+"'")}var u=t[n]={exports:{}};e[n][0].call(u.exports,function(t){var i=e[n][1][t];return r(i?i:t)},u,u.exports)}return t[n].exports}for(var i="function"==typeof require&&require,o=0;n.length>o;o++)r(n[o]);return r}({jsynth:[function(e,t){t.exports=e("uQroT4")},{}],uQroT4:[function(e,t){t.exports=function(e,t){"function"==typeof e&&(t=e,e=new webkitAudioContext);var n=e.createScriptProcessor(2048,1,1);return n.fn=t,n.i=n.t=0,window._SAMPLERATE=n.sampleRate=n.rate=e.sampleRate,n.duration=1/0,n.recording=!1,n.onaudioprocess=function(e){var t=e.outputBuffer.getChannelData(0),r=e.inputBuffer.getChannelData(0);n.tick(t,r)},n.tick=function(e,t){e=e||n._buffer,t=t||[];for(var r=0;e.length>r;r+=1)if(n.t=n.i/n.rate,n.i+=1,e[r]=n.fn(n.t,n.i,t[r]),n.i>=n.duration){n.stop();break}return e},n.stop=function(){n.disconnect(),n.playing=!1,n.recording},n.play=function(){n.playing||(n.connect(n.context.destination),n.playing=!0)},n.record=function(){},n.reset=function(){n.i=n.t=0},n.createSample=function(e){n.reset();var t=n.context.createBuffer(1,e,n.context.sampleRate),r=t.getChannelData(0);return n.tick(r),t},n}},{}]},{},[]),require=function(e,t,n){function r(n,o){if(!t[n]){if(!e[n]){var s="function"==typeof require&&require;if(!o&&s)return s(n,!0);if(i)return i(n,!0);throw Error("Cannot find module '"+n+"'")}var u=t[n]={exports:{}};e[n][0].call(u.exports,function(t){var i=e[n][1][t];return r(i?i:t)},u,u.exports)}return t[n].exports}for(var i="function"==typeof require&&require,o=0;n.length>o;o++)r(n[o]);return r}({tune:[function(e,t){t.exports=e("z8bpzl")},{}],z8bpzl:[function(e,t){"use strict";var n=e("util"),r=function(e){var t=this;return this._octave=4,e=this._parseNotes(e),function(n,r){r=t._options(r);var i=Math.floor(n*r.tempo%e.length);return r.volume*Math.sin(2*Math.PI*e[i]*n)}},i=t.exports=function(e){return new r(e)};i.Tune=r,r.prototype._hz=function(e){return 261.63*Math.pow(Math.pow(2,1/12),e||0)},r.prototype._parseNotes=function(e){var t=this;return"string"==typeof e&&(e=[e]),e.forEach(function(r,i){e[i]=n.isArray(r)?t._parseNotes(r):t._parseNote(r)}),e},r.prototype._parseNote=function(e){if("number"==typeof e)return e;if("."===e)return 0;var t,n="A A# B C C# D D# E F F# G G#".split(" "),r=(t=e.match(/^[a-z]/i))?t[0].toUpperCase():"C",i=(t=e.slice(1).match(/[0-9]/i))?t[0]:this._octave,o=(t=e.slice(1).match(/#|b/i))?t[0]:"";"b"===o&&(r=n[n.indexOf(r)-1],o=""),this._octave=Number(i)||this._octave;var s=n.indexOf(r+o)-n.indexOf("C")+(i-4)*n.length;return this._hz(s)},r.prototype._options=function(e){return e=e||{},e.tempo=e.tempo||4,e.volume=e.volume||1,e}},{util:1}],1:[function(e,t,n){function r(e){return e instanceof Array||Array.isArray(e)||e&&e!==Object.prototype&&r(e.__proto__)}function i(e){return e instanceof RegExp||"object"==typeof e&&"[object RegExp]"===Object.prototype.toString.call(e)}function o(e){if(e instanceof Date)return!0;if("object"!=typeof e)return!1;var t=Date.prototype&&u(Date.prototype),n=e.__proto__&&u(e.__proto__);return JSON.stringify(n)===JSON.stringify(t)}e("events"),n.isArray=r,n.isDate=function(e){return"[object Date]"===Object.prototype.toString.call(e)},n.isRegExp=function(e){return"[object RegExp]"===Object.prototype.toString.call(e)},n.print=function(){},n.puts=function(){},n.debug=function(){},n.inspect=function(e,t,a,c){function f(e,a){if(e&&"function"==typeof e.inspect&&e!==n&&(!e.constructor||e.constructor.prototype!==e))return e.inspect(a);switch(typeof e){case"undefined":return l("undefined","undefined");case"string":var c="'"+JSON.stringify(e).replace(/^"|"$/g,"").replace(/'/g,"\\'").replace(/\\"/g,'"')+"'";return l(c,"string");case"number":return l(""+e,"number");case"boolean":return l(""+e,"boolean")}if(null===e)return l("null","null");var h=s(e),v=t?u(e):h;if("function"==typeof e&&0===v.length){if(i(e))return l(""+e,"regexp");var _=e.name?": "+e.name:"";return l("[Function"+_+"]","special")}if(o(e)&&0===v.length)return l(e.toUTCString(),"date");var d,y,g;if(r(e)?(y="Array",g=["[","]"]):(y="Object",g=["{","}"]),"function"==typeof e){var m=e.name?": "+e.name:"";d=i(e)?" 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Use emitter.setMaxListeners() to increase limit.",this._events[e].length),console.trace())}this._events[e].push(t)}else this._events[e]=[this._events[e],t];else this._events[e]=t;return this},r.prototype.on=r.prototype.addListener,r.prototype.once=function(e,t){var n=this;return n.on(e,function r(){n.removeListener(e,r),t.apply(this,arguments)}),this},r.prototype.removeListener=function(e,n){if("function"!=typeof n)throw Error("removeListener only takes instances of Function");if(!this._events||!this._events[e])return this;var r=this._events[e];if(i(r)){var o=t(r,n);if(0>o)return this;r.splice(o,1),0==r.length&&delete this._events[e]}else this._events[e]===n&&delete this._events[e];return this},r.prototype.removeAllListeners=function(e){return 0===arguments.length?(this._events={},this):(e&&this._events&&this._events[e]&&(this._events[e]=null),this)},r.prototype.listeners=function(e){return this._events||(this._events={}),this._events[e]||(this._events[e]=[]),i(this._events[e])||(this._events[e]=[this._events[e]]),this._events[e]}})(e("__browserify_process"))},{__browserify_process:3}]},{},[]);var master=new(webkitAudioContext||AudioContext),jsynth=require("jsynth"),tune=require("tune"),ff=[];["C D E G","A B C E","C D E G","A B C E","A C F G","A B D G","Ab C Eb G","A Bb D F"].forEach(function(e){e=e.split(" ");for(var t=2,n=[],r=0;6*(e.length-1)>r;r++)0===r%4&&t++,n.push(e[r%4]+t);ff=ff.concat(n.concat(n.slice(0,-1).reverse()))}),ff=tune(ff);var synth=jsynth(master,function(e){return ff(2*e)});synth.connect(master.destination);

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