The Download Now link will download a small installer file to your desktop. Remain online and double-click the installer to proceed with the actual download. But don't be fooled by the lack of a "professional" designation in the title: ACID isn't geared for newbies but for serious music aficionados with some experience with music production software. The interface is tidy and utilitarian overall, but it will likely overwhelm newcomers. The good news is that Sony includes a host of tutorials, including seven that are new to this version, such as "how to use the mixing console" and "how to use tempo change markers. There are tools for recording, editing, and mixing live vocals, instruments, and MIDI input. Plus, you can create all-digital songs with over 3, music loops.