From the Classical period onwards, composers have used Sonata Form to provide the basic framework for their symphonies. A knowledge of Sonata Form is crucial if you want to understand the great symphonies. The contrast and drama between two or more themes and tonalities is the basic premise behind Sonata Form. The best way to get the gist of it is through actual musical examples, so in this guide, we're going to use the first movement of Mozart's Symphony No. 40 in G minor. Mozart's Sonata Form is clear-cut and easy to understand, so it's the best place to start. Here's a diagram of a typical Sonata Form movement: Don't worry if this doesn't make much sense yet. By the time we've finished, it will seem totally logical. Let's take the first movement of Mozart's 40th Symphony. It adheres to the above scheme pretty consistently. Continue the Guide