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

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Okay, so we have-- there's a whole idea of octave duplication— sometimes six notes, sometimes five notes.

现在我们了解到,一整套的重复八度,有时是六音符,有时是五音符

耶鲁公开课 - 聆听音乐课程节选

It's got only six notes within the octave.

一个八度里只有六个音符

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Five notes within the octave just there.

八度里只有五个音符

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We're singing below middle C and the ladies are singing up an octave but that's still monophonic texture-- those notes have the same names.

我们唱得比中央c低,而女士们高了一个八度,但这还是单音织体,这些音的音名是一样的

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I--We were going D G B G B so as long as the notes have the same names or it sounds the same, even though there may be octave doubling in there we still think of that as monophonic texture.

我,我们只要,D G B G B,只要各个音的音名一样或听起来一样,尽管其中有双八度音,我们仍把它作为做单音织体

耶鲁公开课 - 聆听音乐课程节选