“So, you are a king?" Pilate asked this question to confirm that Jesus is calling himself a king, since Jesus said in the previous verse that he has a kingdom. This can be translated as a statement. Alternate translation: “So, you are a king.”(See: [[rc://en/ta/man/jit/figs-rquestion]])
Here "voice" is a synecdoche that refers to words Jesus says. Alternate translation: "the things I say" or "me" (See: [[rc://en/ta/man/jit/figs-synecdoche]])