Microphone.silenceLevel

Property (read-only); an integer that specifies the amount of sound required to activate the microphone and invoke Microphone.onActivity(true). The default value is 10.

Example

The following example changes the silence level based on the user's input in a NumericStepper instance called silenceLevel_nstep. The ProgressBar instance called silenceLevel_pb modifies its appearance depending on whether the audio stream is considered silent. If the audio stream is not silent, the progress bar displays the activity level of the audio stream.

var silenceLevel_pb:mx.controls.ProgressBar;
var silenceLevel_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";
silenceLevel_nstep.minimum = 0;
silenceLevel_nstep.maximum = 100;
silenceLevel_nstep.value = active_mic.silenceLevel;

var nstepListener:Object = new Object();
nstepListener.change = function(evt:Object) {
    active_mic.setSilenceLevel(evt.target.value, active_mic.silenceTimeOut);
};
silenceLevel_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)";
    }
};

The MovieClip.getNextHighestDepth() method used in this example requires Flash Player 7 or later. If your SWF file includes a v2 component (version 2 of the Macromedia Component Architecture), use the DepthManager class from the component framework instead of the MovieClip.getNextHighestDepth() method.

Microphone.silenceLevel

Availability

Usage

Description

Example

See also