Audio

• Changing the Sound Output Device
• If there is no sound coming from an external device connected to your VAIO computer, you need to change the device for sound output.
• Connecting External Speakers/Headphones/Headset
• You can connect external sound output devices (such as speakers, headphones, or a headset) to your VAIO computer.
• Connecting a High-Quality Digital Sound Output Device between Your VAIO Computer and a TV
• You can connect a high-quality home theater receiver or other surround sound decoder devices between your VAIO computer and a TV using an HDMI connection.
• Connecting an External Microphone<Microphone jack equipped models>
• You can connect an external microphone to your VAIO computer and enjoy voice chat, etc.

You might be looking for the following topics:

• Adjusting the Microphone Volume
• Adjusting the Speakers Volume
• Adjusting the Volume in Windows