You don’t have to purchase Serum right away, though. With such offerings, it is only reasonable that this is a paid program. Beginners will be able to start familiarizing themselves with the different instruments straight away. A plethora of customization possibilities are offered through an elegant and simple-to-use interface the wavetables fall into various categories: analog, spectral, and vowel. Using the program's external audio feature and the editor, you can make unique-sounding wavetables.