Using Microphone to Chat
You can call an online contact's computer and talk, using your microphones. You must both have a full-duplex sound card with a headset (or speakers and a microphone) or a USB port with a USB headset (or USB speakers and a USB microphone).
1.In the main window:
Right-click the name of an online contact, and click Start a Voice Conversation.
–or–
Click Start a Voice Conversation under I want to, select the contact you want to talk to, and click OK.
You may have to click More for this to show.
–or–
In the conversation window:
Click Start Talking on the right.
If a contact does not accept your invitation, it may be because the person does not have the necessary sound hardware.