MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference page 465

Example
The following example changes the silence level based on the user's input in a NumericStepper
instance called
silenceLevel_nstep
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 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)";
}
};
For more information, see the example for Camera.setMotionLevel().
See also
Microphone.activityLevel, Microphone.onActivity, Microphone.setGain(),
Microphone.silenceLevel,
. The ProgressBar instance called
Microphone.silenceTimeOut
silenceLevel_pb
Microphone.setSilenceLevel() 465