Perhaps you'd like to brush up on your aural skills? Maybe you need a refresher on other things musical? Aquallegro is a rather lovely and user-friendly way to do just that, and users can also use the application to learn more about music theory. Educators may also wish to recommend this program to their students who cannot wait for their next in-person music class session or lesson. This version is compatible with computers running Mac OS X 10.4 and newer.