现在在演奏的乐器是低音号，一种低音铜管乐器。

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

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加州大学圣地亚哥分校小队发明了一种小号，不仅可以检测小号演奏时的精确音高，还能实时将音高对应至合适的音符——类似于一种铜管乐器的自动调音装置。

UC San Diego created a trumpet that not only detects the exact pitch being played, but can bend that pitch in real time to hit the proper note-a sort of auto-tune for the brass section.

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或者是木管乐器，换句话说，这里演奏的是什么乐器，还有柴可夫斯基在这首协奏曲的开始部分，运用了动机还是主题？

In other words, what — or the woodwinds — what family of instruments is playing here and is Tchaikovsky using a motive or is he using a theme at the very beginning of this concerto?

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