那名歌手唱错了一个音符。

The singer hit a clinker.

《牛津词典》

乐谱为C大音阶而构思，在这个音阶中的每一个线和间都代表一个音符。

Musical notation was conceived for the C major scale and each line and space represents a note in this scale.

《柯林斯英汉双解大词典》

然后一次弹一个音符。

Then play one note at a time.

youdao

We said there are seven notes in each of these two scales, twelve pitches all together within the octave.

我们说在这两个音阶中都有七个音符,一个八度包含十二个音高

耶鲁公开课 - 聆听音乐课程节选

So every gesture of the hand is going to be the equivalent of a quarter note.

那么,每个手部的动作,都相当于一个四分音符

耶鲁公开课 - 聆听音乐课程节选

When an instrument--any instrument--the piano, plays a note what you hear is one fundamental pitch.

当任何乐器,比如钢琴,弹出一个音符时,你听到一个的是一个基本音高

耶鲁公开课 - 聆听音乐课程节选