Develop your 技巧 in 聆 through the guided 聆 exercises in the 聆 间 and test your 技巧 in the 聆 challenges Discover the 多样 范围（排列） of 樂/乐 styles within 声波 底/基于 樂/乐 and 用 these to inspire your own imagination 学习 how composers connect their 知识 of 声 with their imagination to 创作 new 作品 of 声波 底/基于 樂/乐