The Apple Developer Connection today published The Sound of Opportunity Knocking: The Audio Units Community Takes Off. “Audio Units is Apple’s audio plug-in technology for creating audio effects and virtual instruments for Apple applications such as GarageBand, Soundtrack, Logic and Final Cut Pro, as well as a multitude of popular third-party applications. Building Audio Units plug-ins is a growing business opportunity for developers who love audio. Read this article to see what’s involved, how to get started, and how one developer built a successful business.”