For over two decades, Jancke has researched the effects of music lessons, and like Schellenberg, he believes that the only way to truly understand their effects is to run longitudinal studies.
20多年以来，詹克一直在研究音乐课的效果，和舍伦贝格一样，他认为唯一能够真正了解其效果的方法就是进行纵向研究。
"Instructors were good at teaching music but they weren't the best at using technology to run demand and market themselves," says Cox.
“老师们善于教习音乐，但他们在运用网络技术找到需求并推广自己方面不太擅长，”科克斯说。
For a while revenues held up, suggesting it was possible to run a successful music firm on the cheap.
为了总收入支撑下去，这是运营一家音乐公司成功的可能性建议之一。
应用推荐