I would start by reading up on audio encoding formats.  This alone is
a pretty complex topic.  Also, what is you client, what capabilities
does it have?  If the client is a browser that's very different than
say a native mobile client on iOS.  As far as the node part, building
a simple data proxy is easy, but usually you want to do more.

On Wed, Sep 19, 2012 at 11:19 PM, Chi Linh Le <[email protected]> wrote:
> Hi All
>
> I am building a app with push-to-talk (conference call) function.
> Model of app as below.
>
> client A--(voice data)--->server (nodejs)--(voice data)--->client B
>
> I have some question.
>
> 1. How do get voice data from client?
> 2. How do send voice data to all connected client?
>
> Anyhelp is appreciated!
>
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