Question

当用户访问网站时，如何调用计算机内置的麦克风打开？我听说有很多不同的方法可以这样做，但我想就最好的方法提出一些建议。

为了提供一个元级视图，我打算让麦克风拾取噪音并将其显示为图形均衡器（各种类型）但不记录它。

代码表示赞赏！

Answer 1

Here is an example of a Java applet从麦克风中读取。

Answer 2

对于我的flash麦克风，我使用此课程

import org.bytearray.micrecorder.MicRecorder;

import org.bytearray.micrecorder.encoder.WaveEncoder; import org.bytearray.micrecorder.events.RecordingEvent;

（只是谷歌获取代码）和它一样简单

            recorder = new MicRecorder(new WaveEncoder(),null,75,16);
    recorder.addEventListener(RecordingEvent.RECORDING, onRecording)
    recorder.addEventListener(Event.COMPLETE, onRecordComplete)

然后你可以做这样的事情来可视化麦克风噪音的变化。当然你必须制作你自己的.fla影片剪辑，它会显示“声音”然而你想要想象它

public function onRecording(e:RecordingEvent)
{           
    var al:Number = recorder.microphone.activityLevel;
    TweenMax.to(soundMeter, .1, {scaleX:al * .01, onUpdate:onActivitylevelUpdate});//, onUpdateParams:[al]})
}       
public function onActivitylevelUpdate()
{
    xpos = speedX;
    ypos = centerY + Math.sin(angle) * amplitude
    angle += speedAngle;
    graphics.lineTo(xpos,ypos)
}

Answer 3

您希望查看Microphone class以从麦克风中拾取声音，并在computeSpectrum() method处计算均衡器的频率值。

以下是您尝试做的一个示例，来自adobe示例：

package {
import flash.display.Sprite;
import flash.display.Graphics;
import flash.events.Event;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.media.SoundMixer;
import flash.net.URLRequest;
import flash.utils.ByteArray;
import flash.text.TextField;

public class SoundMixer_computeSpectrumExample extends Sprite {

    public function SoundMixer_computeSpectrumExample() {
        var snd:Sound = new Sound();
        var req:URLRequest = new URLRequest("Song1.mp3");
        snd.load(req);

        var channel:SoundChannel;
        channel = snd.play();
        addEventListener(Event.ENTER_FRAME, onEnterFrame);
        channel.addEventListener(Event.SOUND_COMPLETE, onPlaybackComplete);
    }

    private function onEnterFrame(event:Event):void {
        var bytes:ByteArray = new ByteArray();
        const PLOT_HEIGHT:int = 200;
        const CHANNEL_LENGTH:int = 256;

        SoundMixer.computeSpectrum(bytes, false, 0);

        var g:Graphics = this.graphics;

        g.clear();

        g.lineStyle(0, 0x6600CC);
        g.beginFill(0x6600CC);
        g.moveTo(0, PLOT_HEIGHT);

        var n:Number = 0;

        for (var i:int = 0; i < CHANNEL_LENGTH; i++) {
            n = (bytes.readFloat() * PLOT_HEIGHT);
            g.lineTo(i * 2, PLOT_HEIGHT - n);
        }

        g.lineTo(CHANNEL_LENGTH * 2, PLOT_HEIGHT);
        g.endFill();

        g.lineStyle(0, 0xCC0066);
        g.beginFill(0xCC0066, 0.5);
        g.moveTo(CHANNEL_LENGTH * 2, PLOT_HEIGHT);

        for (i = CHANNEL_LENGTH; i > 0; i--) {
            n = (bytes.readFloat() * PLOT_HEIGHT);
            g.lineTo(i * 2, PLOT_HEIGHT - n);
        }

        g.lineTo(0, PLOT_HEIGHT);
        g.endFill();
    }

    private function onPlaybackComplete(event:Event):void {
        removeEventListener(Event.ENTER_FRAME, onEnterFrame);
    }
}}

内置麦克风通话

3 个答案: