| 词汇 | octave |
| 释义 | octave noun[ C ] music specializeduk /ˈɒk.tɪv/ us /ˈɑːk.tɪv/ the distance between two musical notes that are eight notes apart: 八度;八度音阶 Her remarkable vocal range spanned three and a half octaves.她的音域达三个半八度，宽得惊人。 Beats or lengths of musical notes backbeat bar bar line breakbeat common time eighth half note hemidemisemiquaver major seventh major sixth major third metre ninth perfect fourth quadruple quarter note quaver quintuple semibreve semiquaver octave | American Dictionaryoctave noun[ C ] us/ˈɑk·tɪv/ music the space between two musical notes that are eight musical notes apart Examples of octaveoctave For instance, over-blowing on a wind instrument can cause an octave rise, which holds as the pressure is reduced. That is, three downward harmonic pitches are available, plus four or more harmonics in each octave above the original pitch. The remainder is given over to a single tonic butterfly in which the second note is displaced downwards by two octaves. If they start too high, they continually increase the pitch until they reach an octave higher, at which point they simply halve the frequency. Another tempo change ushers in a closing phrase of classical cues based on a tonic triad followed by tonic tones in descending octave leaps. The additional decorrelation of the harmonised version guarantees its being perceived as coming from a separate source, even when the interval is an octave. This solution, which explains the octave doublings as well, seems the most likely, as a brief look at the mechanism of transposition will clarify. Of the various practical solutions proposed, the one that triumphed was the idea of tuning 12 exactly equal semi-tones in an octave. When we simultaneously and continuously move the frequencies of the ten sinusoids to one octave above, we return to the same spectrum. Ideally there should be eight perceivable repetitions (decaying away) which would be an octave transposition (8 6 3/4 tone) in all. Notes common to the harmony and the upper layers are ringed (whether in the same octave or others). On the left-hand side of the board there is a kind of keyboard which corresponds to five octaves of pitch. In order to get rid of it entirely, one has to increase the number of notes to more than 300 per octave. Movement during the performance of the structure might transform the pitch space within a range from one semitone to six octaves. 12. Some use is made of octaves and drones to vary the texture. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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