You can record your own vocal track using the record function.
To record a vocal track:
Click the Animation button.
Click the Facial Animation button.
Click the Modify tab.
Click the Record button to display the
recording window.
Select the input device and set a proper volumn.
Click the Record button in the record
window to begin recording.
Click the Stop button to stop recording.
Click the Play button to play back the
recording.
If the recorded vocal is not satisfactory, click the
Record button again to
discard the previous one and start a new recording .
Click the OK button to leave the recording
window. If you made a recording you will be asked to give it a name and
save it before exiting.