Help Upgrading USB Audio Controller

I have a USB Audio Device (Sound Card- C-Media USB Headphone Set), specfications goes:

 

USB Audio Device

 

Integrated 2 Channel
USB Audio Controller

 

Device Type: Sound, video and game controllers
Manufacturer: Generic USB Audio
Location: Location 0 (C-Media USB Headphone Set)

 

Driver Provider: Microsoft
Driver Date: 7/1/2001
Driver Version: 5.1.2535.0
Digital Signer: MIcrosoft Windows Publisher
Driver File: //Windows/system32/drivers/USBAUDIO.sys

 

Remark(s): The device is enabled and functioning properly.

 

Upgrade Woes goes:

 

Searched the net for an updated drivers for a couple of providers but couldn't find the apt ones. Even Window's Update Driver Wizard seem unable to find updates for USBAUDIO.sys driver file.

 

I like to enable Virtual 5.1 Sound Track on the device. It has been going well with 3D Sound(AC-3). Where can I find Advanced Environment Effects, Sizes and Band/Pre-set Equalizers, EAX, Speaker Shifter for my device? I think these are Software Value added for music and gaming. Any idea?I also like to know about Xearphone.

 

Is there anything to do with <Digital Class-B Power Amplifier> which is built-in component inside the device, it's PD 552.

 

Please, help me upgrade my SOUND Xperience!