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How to show a microphone activity indicator in Actionscript 3

Here is what I did, first setup a timer:

var micDelay:uint	= 100;
var micRepeat:uint	= 0; /* Run forever */
var micTimer:Timer = new Timer(micDelay, micRepeat);

And then tell it to call our function every 100 milliseconds:

micTimer.addEventListener(TimerEvent.TIMER, ShowMicActivity);

Then the function:

var min:Microphone = new Microphone();
var micActivityIndicator:Shape = new Shape();
function ShowMicActivity(e:TimerEvent):void {
             var h:int = 0;
             var y:int = 0;
	if (mic.activityLevel &gt; 0) {
		h = mic.activityLevel;
		y = 150 - mic.activityLevel;
	} else {
		h = 5;
		y = 150 - 5;
	}
	micActivityIndicator.graphics.clear();
	micActivityIndicator.graphics.beginFill(0x000000);
	micActivityIndicator.graphics.drawRect(0, y, 10, h);
	micActivityIndicator.graphics.endFill();
}

I hope this helps someone, I couldn’t find anything online.

Filed under: Actionscript,Flash Posted by: Hamid

7 Comments »

luke:

you haven’t defined the microphone in this code.

var mic:Microphone=new Microphone();

you also have a duplicate variable definition by defining h and y twice.

helpful code as starting point but might want to check for errors before sharing…

Comment
admin:

Hey, thanks, but this code was meant to be exactly a starting point and I kind of assumed that whoever is looking for this, knows that the mic needs to be defined…

I fixed up the code to prevent any future confusion.

Thanks again

Comment
ilike2flash:

Thanks, this is an interesting script.

Comment
g:

Also, you need to add

micTimer.start();

and

addChild(micActivityIndicator);

Comment
Shippy:

You can’t do that:
var min:Microphone = new Microphone();

Instead use this:
var min:Microphone = Microphone.getMicrophone();

(See the Actionscript 3 reference)

Comment
M:

Thank you very much. This is exactly what I was looking for.

Comment
vinay:

Thanks man! I got what i want.

Comment