Windows 7 needed
SuperbarMonitor.Volume is a free application for Windows 7 that lets you view and control your computer's volume from the task bar.
The graphically represented volume level is represented in the preview show in Windows 7.
The program lets you turn volume up or down from the preview window. You can disable the word from this display.
Appearance of the bar can be configured from the program's Options window, and it may run at startup.
This makes SuperbarMonitor. Windows 7's Standard Volume Control is a Better Alternative Volume.