Where do the frequencies of the Genius come from?

The frequencies are selected by the developer and the exact source is proprietary.

They are various frequencies, that through research have been found to bring harmony to the organ or system that is being worked on (liver, circulatory system and more).

Resources you could dive into include Rife Frequency books, which have many researched frequencies that could be used for different effects. This is one of the resources that the developer has used in creating the Genius, among others.