<!-- Copyright 2010, Google Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Google Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html><head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title> Javascript Audio Processing </title> <script src="https://google-code-prettify.googlecode.com/svn/loader/run_prettify.js?autoload=true&skin=sunburst&lang=css" defer="defer"></script> <!-- <link rel="stylesheet" type="text/css" href="javascript-processing_files/simple.css"> --> <script src="../maxiLib.js"></script> <!-- <script src="../maxi_webAudio.js"></script> --> <!-- Our javascript code --> <script type="text/javascript"> var audio = new maximJs.maxiAudio(); audio.init(); var myCounter = new maximJs.maxiOsc(); //these oscillators will help us count and play sound var mySwitchableOsc = new maximJs.maxiOsc();// var CurrentCount;// var myOscOutput,myCurrentVolume;// var myEnvelope = new maximJs.maxiEnv(); //Timing is in ms myEnvelope.setAttack(0); myEnvelope.setDecay(1); // Needs to be at least 1 myEnvelope.setSustain(1); myEnvelope.setRelease(1000); audio.play = function(){ //notice that we feed in a value of 1. to create an envelope shape we can apply later. myCurrentVolume=myEnvelope.adsr(1.,myEnvelope.trigger); CurrentCount=Math.round(myCounter.phasor(1, 1, 9));//phasor can take three arguments; frequency, start value and end value. // You'll notice that these 'if' statements don't require curly braces "{}". // This is because there is only one outcome if the statement is true. if (CurrentCount==1){ myEnvelope.trigger=1; //trigger the envelope } else { myEnvelope.trigger=0;//release the envelope to make it fade out only if it's been triggered } if (CurrentCount<5){ myOscOutput=mySwitchableOsc.sawn(CurrentCount*100); } else if (CurrentCount>=5) {//and the 'else' bit. myOscOutput=mySwitchableOsc.sinewave(CurrentCount*50);//one osc object can produce whichever waveform you want. } this.output=myOscOutput*myCurrentVolume;//left speaker } </script> </head> <body> <h1> Envelope Example </h1> <p> </p> <pre class="prettyprint lang-js linenums:true" id="quine" style="border:4px solid #88c" > var audio = new maximJs.maxiAudio(); audio.init(); var myCounter = new maximJs.maxiOsc(); //these oscillators will help us count and play sound var mySwitchableOsc = new maximJs.maxiOsc();// var CurrentCount;// var myOscOutput,myCurrentVolume;// var myEnvelope = new maximJs.maxiEnv(); //Timing is in ms myEnvelope.setAttack(0); myEnvelope.setDecay(1); // Needs to be at least 1 myEnvelope.setSustain(1); myEnvelope.setRelease(1000); audio.play = function(){ //notice that we feed in a value of 1. to create an envelope shape we can apply later. myCurrentVolume=myEnvelope.adsr(1.,myEnvelope.trigger); CurrentCount=Math.round(myCounter.phasor(1, 1, 9));//phasor can take three arguments; frequency, start value and end value. // You'll notice that these 'if' statements don't require curly braces "{}". // This is because there is only one outcome if the statement is true. if (CurrentCount==1){ myEnvelope.trigger=1; //trigger the envelope } else { myEnvelope.trigger=0;//release the envelope to make it fade out only if it's been triggered } if (CurrentCount<5){ myOscOutput=mySwitchableOsc.sawn(CurrentCount*100); } else if (CurrentCount>=5) {//and the 'else' bit. myOscOutput=mySwitchableOsc.sinewave(CurrentCount*50);//one osc object can produce whichever waveform you want. } this.output=myOscOutput*myCurrentVolume;//left speaker } </pre> </body></html>