Tonal design
Obviously, all three of these aspects of music play an important role when analyzing a piece. The Phrases are important to know for when the themes begin and end. most of the time a theme begins as one ends on a phrase. Themes can last for more than one phrase. The essentials of tonal design is being able to identify the pattern of cadences and modulations that take place. Being able to identify key is essential for knowing when modulations occur. Knowing when modulation occur is helpful for when identifying themes within certain forms.
Part II - Cadences and segmentation
A cadence refers to the completion of a melodic and harmonic progression. We've already discussed cadences and the different types of cadences throughout the Music theory lessons. So I do not need to go into much detail here. just know that a cadence marks the end of a musical idea. In this case, it will be a melodic idea.
