Microphone.addEventListener(SampleDataEvent.SAMPLE_DATA) Causes output volume to decrease

Question

I would like to record sound from the microphone in AIR.
This is working, except that while recording, AIR reduces the volume of all playing sounds.
This volume reduction is triggered by
microphone.addEventListener(SampleDataEvent.SAMPLE_DATA, myFunction);
It should be noted that myFunction() can be completely empty. The output volume is still reduced.
How to reproduce:
// Start playing a sound
var url:String = "100Hz_44100Hz_16bit_30sec.mp3";
var urlRequest:URLRequest = new URLRequest(url);
var isound:Sound = new Sound();
isound.load(urlRequest);
isound.play();
// Set up the microphone
var microphone = Microphone.getMicrophone();
microphone.setUseEchoSuppression(false); // I have tried both ways.
microphone.setLoopBack(false); // I have tried both ways.
microphone.rate = 44;
// Start recording
microphone.addEventListener(SampleDataEvent.SAMPLE_DATA, gotMicData);
// The volume of 'isound' will now be reduced until the microphone listener is removed.
// Once the listener is removed, the volume of 'isound' returns to normal.
I do NOT want the volume of other playing sounds to be reduced while recording. How might I do this?
Note: I am using Windows 7.

Answer 1

I believe reducing volume on mic record is a Windows 7 feature and nothing to do with Air.
To disable this, take the following steps:
Click Windows button
Choose Control Panel
Choose "Hardware and Sound"
Choose "Manage audio devices" under the "Sound" heading
Goto the "Communications" tab
Set "When windows detects communications activity" to "Do Nothing"
Even though that setting says it's supposed to adjust volume when placing telephone calls using you computer, I have had it reduce volume in some programs when i activate the microphone.
Let me know if that works for you.
Edit:  Heh, was reading some other recent forum posts to see if there was anything else I could help with.  The thread "2 flash instances & Windows 7" currently a few below this one on the front page mentions this Windows 7 Feature, although it's causing a different issue for him.