Great reaction, more DEN pls!😂 & most of the sounds are self explanatory like for example the first sound you asked about where he does bass with his lips + vocals combined is called ‘Vocalized Lip Bass’. The crazy loud bass sound he does (& is known for) is called Inward Bass. In the beginning he was also using Throat Bass. Also known as Mongolian Throat Singing lol. The process for building a bbx routine is most commonly just freestyling, then picking out parts/ideas you like & memorizing those. Verrrryyyy few bbxers write down their sounds/words. & you’re spot on about how each bbxer has their own “genre” or style. At the top level barely any bbxers sound alike. Even if they’re all using mostly the same sounds as eachother, the texture & context of the sounds is diverse.