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<!doctype html>
<html>
<head>
<title>WebAudio Csound</title>
<style type="text/css">
html, body {
font-family: Monospace;
color: #bf94f7;
background-color: #000055;
}
#console {
font-family: Monospace;
color: #b5b6ff;
background-color: #000000;
font-size: 16px;
width: 805px;
display: flex;
align-items: center;
justify-content: center;
border-style: solid;
padding: 20px 0px;
}
H1 {
font-size: 36px;
}
#playButton {
margin: auto;
font-family: Monospace;
width: 805px;
padding: 10px 0px;
font-size: 24px;
background-color: #b5b6ff;
}
</style>
<script src='js/CsoundObj.js'></script>
<script>
let count = 0;
let csoundObj;
const TEST_CSD =
`
<CsoundSynthesizer>
<CsOptions>
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
nchnls = 2
nchnls_i = 1
0dbfs = 1
instr 1
ain inch 1
al, ar reverbsc ain,ain, 0.6, 5000
out al, ar
endin
</CsInstruments>
<CsScore>
i1 0 36000
</CsScore>
</CsoundSynthesizer>
`;
CsoundObj.initialize().then(() => {
csoundObj = new CsoundObj();
csoundObj.enableAudioInput((res) => {
if (res) {
csoundObj.setMessageCallback((msg) => {
var element = document.getElementById('console');
element.value += "\n" + msg;
element.scrollTop = 99999; // focus on bottom
count += 1;
if (count == 1000) {
element.value = ' ';
count = 0;
}
});
document.getElementById('playButton').addEventListener('click',
click_this);
document.getElementById('playButton').disabled = false;
CsoundObj.CSOUND_AUDIO_CONTEXT.suspend();
csoundObj.compileCSD(TEST_CSD);
csoundObj.start();
} else {
alert("Unable to start microphone.");
}
});
});
var playing = false;
function click_this() {
if (playing == false) {
CsoundObj.CSOUND_AUDIO_CONTEXT.resume();
document.getElementById('playButton').innerText = "off";
playing = true;
} else {
CsoundObj.CSOUND_AUDIO_CONTEXT.suspend();
document.getElementById('playButton').innerText = "on";
playing = false;
}
}
</script>
</head>
<body>
<H1>Reverb</H1>
<textarea class="console" rows="24" id="console">Csound: loading...</textarea>
<p>
<button id="playButton" disabled>on</button>
</p>
</body>
</html>
|
