Octave vs. Sestet — What's the Difference?

In music, an octave (Latin: octavus: eighth) or perfect octave (sometimes called the diapason) is the interval between one musical pitch and another with double its frequency. The octave relationship is a natural phenomenon that has been referred to as the "basic miracle of music," the use of which is "common in most musical systems." The interval between the first and second harmonics of the harmonic series is an octave.

A sestet is six lines of poetry forming a stanza or complete poem. A sestet is also the name given to the second division of an Italian sonnet (as opposed to an English or Spenserian Sonnet), which must consist of an octave, of eight lines, succeeded by a sestet, of six lines.

The interval of eight diatonic degrees between two tones of the same name, the higher of which has twice as many vibrations per second as the lower.

A group of six lines of poetry, especially the last six lines of a Petrarchan sonnet.

A tone that is eight diatonic degrees above or below another given tone.

A poem or stanza containing six lines.

Two tones eight diatonic degrees apart that are sounded together.

(music) A piece of music composed for six voices or six instruments; a sextet or sestuor.

The consonance that results when two tones eight diatonic degrees apart are sounded.

(poetry) The last six lines of a sonnet, forming two stanzas of three lines each.

A series of tones included within this interval or the keys of an instrument that produce such a series.

A piece of music composed for six voices or six instruments; a sextet; - called also sestuor.

An organ stop that produces tones an octave above those usually produced by the keys played.

The last six lines of a sonnet.

The interval between any two frequencies having a ratio of 2 to 1.

The cardinal number that is the sum of five and one

The eighth day after a feast day, counting the feast day as one.

Six performers or singers who perform together

The entire period between a feast day and the eighth day following it.

A set of six similar things considered as a unit

A group or series of eight.

A musical composition written for six performers

A group of eight lines of poetry, especially the first eight lines of a Petrarchan sonnet. Also called octet.

A rhythmic group of six lines of verse

A poem or stanza containing eight lines.

(Sports) A rotating parry in fencing.

(music) An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch frequency.

(music) The pitch an octave higher than a given pitch.

(music) A coupler on an organ which allows the organist to sound the note an octave above the note of the key pressed (cf sub-octave)

(poetry) A poetic stanza consisting of eight lines; usually used as one part of a sonnet.

(fencing) The eighth defensive position, with the sword hand held at waist height, and the tip of the sword out straight at knee level.

(Christianity) The day that is one week after a feast day in the Latin rite of the Catholic Church.

(Christianity) An eight-day period beginning on a feast day in the Latin rite of the Catholic Church.

A small cask of wine, one eighth of a pipe.

An octonion.

(signal processing) Any of a number of coherent-noise functions of differing frequency that are added together to form Perlin noise.

(astrology) The subjective vibration of a planet.

(obsolete) Consisting of eight; eight in number.

The eighth day after a church festival, the festival day being included; also, the week following a church festival.

The eighth tone in the scale; the interval between one and eight of the scale, or any interval of equal length; an interval of five tones and two semitones.

The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines.

A small cask of wine, the eighth part of a pipe.

Consisting of eight; eight.

A feast day and the seven days following it

A musical interval of eight tones

A rhythmic group of eight lines of verse