It starts with low instruments and then moves to higher ones, and then back to low ones.

开始用低音乐器演奏低音,然后转向更高的,最后回归到低音

耶鲁公开课 - 聆听音乐课程节选

Now the instrument is--that is--playing is a low tuba, a low brass instrument.

现在在演奏的乐器,是低音号,一种低音铜管乐器

耶鲁公开课 - 聆听音乐课程节选

And then finally we could add that--the idea that maybe with a lot of electronic basses and things like that that they play--they tend to play the bass just louder.

然后最后我们可以添加这个，一种很多电贝斯和其他同类乐器演奏的方式,倾向于将低音演奏得响亮一些。

耶鲁公开课 - 聆听音乐课程节选

So, we'll listen to the end of the third presentation of this with the contrapuntal idea dominated by strings, melody, bass, other stuff in the middle and then he will bring in the brass for the final statement of this.

我们听完第三次主题呈现,由对位理念主导的,弦乐组,旋律,低音部,以及中间的东西,然后他会引入铜管乐器,作为最后的陈述

耶鲁公开课 - 聆听音乐课程节选