[Red5] Publishing multiple streams: how is the badnwidth affected

[Francos]

Hello,

This is more a flash question than a red5 question.

If I create two netStream object using the same net connection :
1/ The first one I publish audio attaching the microhone for recording 
purpose
2/ The other I publish audio and video attaching webcam and microhone

Then is the audio stream sent two times at the same time ? Does it 
affect the bandwidth ?

Thanks for your answer,
Francos