à l'octave

An octave is the interval between one musical pitch and another with double or half its frequency. For example, if one note has a frequency of 440 Hz, the note one octave above is at 880 Hz, and the note one octave below is at 220 Hz. The ratio of frequencies of two notes an octave apart is therefore 2:1.

If. You count the letters in between like a 2a a-b-c-d-e-f-g a that's 8 notes and the word octaves comes from the Latin word for 8. You might notice that these notes sound very similar in a way.

octave, in music, an interval whose higher note has a sound-wave frequency of vibration twice that of its lower note. Thus the international standard pitch A above middle C vibrates at 440 hertz (cycles per second); the octave above this A vibrates at 880 hertz, while the octave below it vibrates at 220 hertz.

To indicate that a note, section, phrase or part of the music is to be played one octave higher than written, we write 8va above the music. To indicate that a note, section, phrase or part of the music is to be played one octave lower than written, we write 8va OR 8vb below the music.

The next pitch is called the octave because it's the eighth note (just as an octopus has eight legs). More than a thousand years ago the letters of the Roman alphabet were adopted to refer to these, and since there were only seven the letters ran A, B, C, D, E, F, G.

The seventh octave is the highest octave of a piano. Using middle C (C4) as a guide, the next higher C is C5 or tenor C. The next C is C6 or soprano high C. The next C, C7 or double high C, is again one octave higher.

Octave helps in solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with MATLAB. It may also be used as a batch-oriented language.

And bass cliffs octave numbers are assigned from C up to B. And change at the next C. Here are the octave numbers as they apply to the piano keyboard to calculate the frequency of an octave multiply.

Western music typically uses 12 notes – C, D, E, F, G, A and B, plus five flats and equivalent sharps in between, which are: C sharp/D flat (they're the same note, just named differently depending on what key signature is being used), D sharp/E flat, F sharp/G flat, G sharp/A flat and A sharp/B flat.

In the western musical scale, there are 12 notes in every octave. These notes are evenly distributed (geometrically), so the next note above A, which is B flat, has frequency 440 × β where β is the twelfth root of two, or approximately 1.0595.

More precisely, an octave is the interval between 2 pitches where one has a frequency, or rate of vibration, that is twice as fast as the other. For example, the pitch created by a string that vibrates 440 times per second is an octave above the pitch created by a string that vibrates 220 times per second.

Any moderately curious person will ask themselves at some point why, in western music, is the octave divided into 12 'semi-tones'. From a mathematical point of view, we can easily explain why 12 works nicely. The Greeks realized that sounds which have frequencies in rational proportion are perceived as harmonius.