Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
<!--
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="../maxi_webAudio.js"></script> -->
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();//
Dr-Dan
committed
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(){
Dr-Dan
committed
//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
Dr-Dan
committed
if (CurrentCount<5){
Dr-Dan
committed
myOscOutput=mySwitchableOsc.sawn(CurrentCount*100);
}
else if (CurrentCount>=5) {//and the 'else' bit.
Dr-Dan
committed
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>
<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(){
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
//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