Audio Plugin Player is a lightweight VST and AU instrument plug-in host for Mac OS X that allows you to play these instruments using either your mouse, computer keyboard, or MIDI device (both hardware and software MIDI devices supported). It has a simple, one-screen interface, that will let you start making music with your favorite audio instrument plug-ins in seconds – just choose your plug-in, make your input and output choices, and you're ready. Audio Plugin Player also allows you to route your plugin instrument through a plugin effect (either VST or AU) as well.