<!-- 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 sound1 = new maximJs.maxiSample(); var snarePhase = new maximJs.maxiOsc(); var timer = new maximJs.maxiOsc(); var envelope = new maximJs.maxiEnv(); var currentCount = 0,lastCount = 0,playHead = 0; var sequence = [1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0]; //This is the sequence for the kick var sampleTrigger = 0; var sampleOut = 0; audio.outputIsArray(true, 2); audio.loadSample('audio/kick1.wav', sound1); audio.play = function(){ if(sound1.isReady()){ currentCount=Math.floor(timer.phasor(8));//this sets up a metronome that ticks 8 times a second if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound sampleTrigger=sequence[playHead%16]; playHead++;//iterate the playhead lastCount=0;//reset the metrotest } //the envelope we're using here is an AR envelope. //It has an input (which in this case is a sound) //It has an attack coefficient, a hold val (in samples) //and a release coefficient. Finally, it has a trigger input. //If you stick a 1 in the trigger input, it retriggers the envelope sampleOut=envelope.ar(sound1.play(1.), 0.1, 0.9999, 1, sampleTrigger); // this.output[0]=sampleOut;//left channel this.output[1]=sampleOut;//right channel sampleTrigger = 0;//set trigger to 0 at the end of each sample to guarantee retriggering. } } </script> </head> <body> <h1> Enveloping </h1> <p> this tutorial explains how to use the maxiEnv </p> <pre class="prettyprint lang-js linenums:true" id="quine" style="border:4px solid #88c" > var audio = new maximJs.maxiAudio(); audio.init(); var sound1 = new maximJs.maxiSample(); var snarePhase = new maximJs.maxiOsc(); var timer = new maximJs.maxiOsc(); var envelope = new maximJs.maxiEnv(); var currentCount = 0,lastCount = 0,playHead = 0; var sequence = [1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0]; //This is the sequence for the kick var sampleTrigger = 0; var sampleOut = 0; audio.outputIsArray(true, 2); audio.loadSample('audio/kick1.wav', sound1); audio.play = function(){ if(sound1.isReady()){ currentCount=Math.floor(timer.phasor(8));//this sets up a metronome that ticks 8 times a second if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound sampleTrigger=sequence[playHead%16]; playHead++;//iterate the playhead lastCount=0;//reset the metrotest } //the envelope we're using here is an AR envelope. //It has an input (which in this case is a sound) //It has an attack coefficient, a hold val (in samples) //and a release coefficient. Finally, it has a trigger input. //If you stick a 1 in the trigger input, it retriggers the envelope sampleOut=envelope.ar(sound1.play(1.), 0.1, 0.9999, 1, sampleTrigger); // this.output[0]=sampleOut;//left channel this.output[1]=sampleOut;//right channel sampleTrigger = 0;//set trigger to 0 at the end of each sample to guarantee retriggering. } } </pre> </body></html>