My USB headset and my USB webcam are functioning normally. I can use Skype without any problem. However, even when I allow Flash to record through my webcam and microphone (http://www.macromedia.com/support/documentation/fr/flashplayer/help/settings_manager.html), still I can't record my voice over the mic in any Flash app. Video through the webcam and sound output in the headset are ok.
I have read the following posts, but there was no usefull answer:
Thank you for your help.