There are a few different types of drone synths available on the market, but the two most popular types are the subtractive synth and the additive synth. The subtractive synth is a more traditional synth type, and is used to create music with chords and melodies. It is easy to use and can be edited using a variety of software tools. The additive synth is a more innovative type of synth, and is used to create more complex sounds. It is more difficult to use than a subtractive synth, but can be more powerful and versatile. Both types of synth can be used to create music, but it is important to choose the right one for your specific needs.