Bio: 我叫大卫，我是瑞士人，我是工程师。我现在在太阳能行业工作。除了工作之外，我喜欢做运动和旅行。

Bio: 年龄52岁

Bio: I show singers what to focus on in a sea of overwhelming information, so they can unlock their true voice with emotional triggers.

Bio: I like learning new languages, reading comics, and watching movies