This is a simple utility to have MusicMagic Mixer hide via the system tray (aka the taskbar notification area). I recommend you use this to launch MMM as well, as it will automatically launch MMM if it is not running. Just change your start menu shortcut to point to 'MMM Tray Control.exe' instead of MusicMagicMixer.exe.
Once running, you can hide/show/quit MMM from the tray menu, a global hotkey, or from MMM itself. You can configure it to launch MMM hidden, and can control whether MMM is restored on top or not via the ini file.
This is a simple program which can be used to read and write tags for AAC files. It also builds on Mac OS X.