For voice chatting on Italki Chat, MSN Messenger, Yahoo Messenger and Skype.
For quality communication and learning experience, I suggest using a "Headset with attached microphone" using a desktop microphone will cause an "echo" and lots of frustration.
Before you do, I would go to the top of the page and click on "Find a Language Partner" or click on "Groups" and join one of the many language groups we have. Good luck and hope this helps you.