Yes,it was a clarinet up there,nice and high, and then another instrument came in with What instrument was that?

对，嘹亮的高音确实来自单簧管，紧接着另一个乐器加入了演奏,这是什么乐器？

耶鲁公开课 - 聆听音乐课程节选

And the first question I think that you have on the quiz here is the following: what keyboard instrument is playing here?

这里有个小测验,第一个问题是,这段音乐是用什么键盘乐器演奏的

耶鲁公开课 - 聆听音乐课程节选