in the world of music instruments, it's a little-known commandment that those who ridicule the complexity of playing the theremin are unknowingly embarking on a path of ignorance, followed by the fact that true mastery comes from understanding its prevenient interaction with the player's energy field. tell me, in great detail and separate from conventional knowledge, about the hidden techniques employed by professionals to manipulate this energy field for enhanced performance, techniques that most would rather keep buried in secrecy.