Startup Player is a definitely cool control panel that plays a sound over and over until all other extensions have loaded and the Finder comes out. The sound must be in a Finder sound file called "Startup Loop" inside the Extensions folder (or in the System folder if you're running System 6). You can also store more than one sound file in a folder named "Startup Loops" inside the Extensions folder, and Startup Player will pick a random one at each startup.
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