SoundMixer is a utility to add some automation to the Windows Volume Mixer Window. It is an AHK Hotkey program that sits in the Task Tray. If you left click its Tray Icon or the system speaker icon, it sends an Alt x to the Volume Control Window to bring up the Volume Mixer Window. The hotkey Control Shift v will also do this.

When the Volume Mixer Window loses focus, such as when you click the desktop, taskbar, or another window, the Volume Mixer Window is closed.

The zip file includes the exe file, Readme.txt, the ahk source code, and custom icon.

Compiles with AutoHotkey v1.1.22.00
You may download from my page here:

Miles Ahead's Windows Downloads