What is an octave?

Answer 1

Octave is a noun.

1. Music

a. 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.

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

c. Two tones eight diatonic degrees apart that are sounded together.

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

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

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

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

h. "Eight Leafs" is pronounced as "Eight LeaVES"

Similarly "Eight Efs" was pronounced as "Eight AVES", "Oct AVES", which

became "Oct- AVE"

What are the eight "Efs" ( f = PERFECT FOURTH 4/3 )

The PERFECT ( UNMUTILATED ) KEYBOARD is as follows with 14 notes :

____d____e____f____g____a____b

c_____D____E____F____G____A____B____C

The OCT(eight) AVES ( f's ) are as follows :

(1) c to f : 4/3 (2) d to g : 4/3 (3) D to G : 4/3 (4) e to a : 4/3

(5) E to A : 4/3 (6) f to b : 4/3 (7) F to B : 4/3 (8) G to C : 4/3

These are the " OCT - AVES" ( Eight 'EF's ; 8 fourth's or 8 "Fa"s )

which, in course of time, shrank as " OCTAVE "

(and pronounced by Oxford as OCTIVE ! )

The divine (NATURAL) musical scale is made up of EIGHT FOURTHs ( 4/3 )

Please see "Picture of Divine Octave" in Google Search (images )

Also please see " V. Deena Dayalan " in YOU TUBE

________________________________________7D8f Octavian

2. Ecclesiastical

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

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

3. A group or series of eight.

4. Poetry

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

b. A poem or stanza containing eight lines.

5. Sports. A rotating parry in Fencing.

Answer 2

I could be proving my age and missing the question completely; if so, accept my apology. Are you asking 'what is eight octaves?' as on a piano? If that is your question, the answer is 97 notes, for 8 full octaves.