You can connect an external microphone to your VAIO computer and enjoy voice chat, etc.
If you connect or disconnect the microphone to/from your VAIO computer while running a voice recording app, voice recording may fail or the app may exit.
Connect the microphone and select it as the sound recording device for Windows before starting the app.
Use a plug-in-power microphone.
Refer to the manual that came with your microphone.
If microphone feedback occurs, move the microphone away from your speakers.