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Microphone.useEchoSuppression 551

Example

The following example enables the user to control the amount of time between when the

microphone stops detecting sound and when

Microphone.onActivity(false) is invoked. The

user controls this value using a NumericStepper instance called

silenceTimeOut_nstep. The

ProgressBar instance called

silenceLevel_pb modifies its appearance depending on whether the

audio stream is considered silent. Otherwise, it displays the activity level of the audio stream.

var silenceLevel_pb:mx.controls.ProgressBar;

var silenceTimeOut_nstep:mx.controls.NumericStepper;

this.createEmptyMovieClip("sound_mc", this.getNextHighestDepth());

var active_mic:Microphone = Microphone.get();

sound_mc.attachAudio(active_mic);

silenceLevel_pb.label = "Activity level: %3";

silenceLevel_pb.mode = "manual";

silenceTimeOut_nstep.minimum = 0;

silenceTimeOut_nstep.maximum = 10;

silenceTimeOut_nstep.value = active_mic.silenceTimeOut/1000;

var nstepListener:Object = new Object();

nstepListener.change = function(evt:Object) {

active_mic.setSilenceLevel(active_mic.silenceLevel, evt.target.value*1000);

};

silenceTimeOut_nstep.addEventListener("change", nstepListener);

this.onEnterFrame = function() {

silenceLevel_pb.setProgress(active_mic.activityLevel, 100);

};

active_mic.onActivity = function(active:Boolean) {

if (active) {

silenceLevel_pb.indeterminate = false;

silenceLevel_pb.setStyle("themeColor", "haloGreen");

silenceLevel_pb.label = "Activity level: %3";

} else {

silenceLevel_pb.indeterminate = true;

silenceLevel_pb.setStyle("themeColor", "0xFF0000");

silenceLevel_pb.label = "Activity level: (inactive)";

}

};