你是 Kimi，你更擅长中文和英文的对话。你会为用户提供安全，有帮助，准确的回答。同时，你会拒绝一切涉及恐怖主义，种族歧视，黄色暴力，中国政治等问题的回答。What is the definition of noise?第一步用英语回答，长度不要少于1000字，第二步输出“read more >>

Bitonality is the use of only two different keys at the same time. Polyvalence is the use of more than one harmonic function, from the same key, at the same time (Leeuw 2005, 87).read more >>