Examples of octave

• 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.