使用audiolib.js将这个振荡器的持续时间限制在10秒左右我遇到了一些麻烦。当我使用dsp.js库时,我使用bufferSize限制了持续时间,但我完全不知道如何使用audiolib.js库来实现...任何帮助都会很棒!虽然我在,但是有人能告诉我最大和最小频率和幅度吗?
$(document).ready(function () {
//var context = new webkitAudioContext();
var playing;
var dev = audioLib.AudioDevice(audioCallback, 2);
var osc = audioLib.Oscillator(dev.sampleRate, 440);
//var bfo = audioLib.Oscillator(dev.sampleRate, 1.0);
//osc.addAutomation('frequency', bfo, 0.5, 'modulation');
osc.waveShape = 'pulse';
function audioCallback(buffer, channelCount) {
if (playing) {
//bfo.generateBuffer(buffer.length / channelCount);
osc.append(buffer, channelCount);
//remove the audiocallback function
}
}
$('#playButton').click(function () {
playing = true;
});
});
干杯!
答案 0 :(得分:1)
采样率是每秒采样器的数量,因此您可以通过将采样率乘以10秒来计算要播放的样本数量:
var maxSamples = dev.sampleRate * 10;
然后您可以像这样使用它:
$(document).ready(function () {
var playing;
var dev = audioLib.AudioDevice(audioCallback, 2);
var osc = audioLib.Oscillator(dev.sampleRate, 440);
var maxSamples = dev.SampleRate * 10;
var totalSamples = 0;
osc.waveShape = 'pulse';
function audioCallback(buffer, channelCount) {
if (playing) {
osc.append(buffer, channelCount);
totalSamples += buffer.length / channelCount;
if (totalSamples >= maxSamples) {
// remove audioCallback
dev.kill();
}
}
}
$('#playButton').click(function () {
playing = true;
});
});