What's an octave??

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An octave is represented by a doubling of frequencies in a scale of musical notes.

An octave up from A 440 (the "A" note at 440hz) is A 880, then next is A 1760, etc... an octave down would be A 220...
 
i don't get it..
is there an octave on a piano?? Sorry to ask stupid questions :o
 
There are 10-octaves on a full-size piano....

Pick any note (white keys).... now count 12 keys either up or down.... that key is the up/down octave of the first note...
 
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Blue Bear Sound said:
There are 10-octaves on a full-size piano....


Holy shit, Bear! Please post a pic of that mother of all pianos... I gotta see it!:eek:
 
Maybe he meant the 10 Octaves of Love of the Mahavishnu. . .

:D
 
Or maybe those other three octaves are the ones Bruce sings when he steps out of the shower and into a (navel-deep) snow bank... :=))
 
Blue Bear Sound said:
There are 10-octaves on a full-size piano....

Pick any note (white keys).... now count 12 keys either up or down.... that key is the up/down octave of the first note...

That's a little misleading Bruce. You forgot to mention the black keys. So, here's the full version.

Pick any note (white or black keys)....now count 12 keys (black and white) either up or down.... that key (the one you end up on) is the lower/higher octave of the first note.
 
So let's talk about secunda, terts, quart, quint, sept and.........octave?




Did I forget something?
 
Okay... Just so you know

The first note of a scale is called the Tonic.

The second note is called the Supertonic. This may be either one (in which case it is a Minor Second) or two (a Major Second) semi-tones above the Tonic.

The third note is the Mediant, so called because it is exactly halfway between the Tonic and the Dominant (which we'll come to in a bit). This note can be either three (a Minor Third) or four (a Major Third) semi-tones above the Tonic.

The fourth note we come to is known as the Sub-Dominant, because it is the note below the Dominant. It is exactly five semi-tones above the Tonic. It is also called the Perfect Fourth and is one of the two pivots of the major scale (see next but one).

Between the Sub-Dominant and the Dominant lies the Tri-Tone (Augmented Fourth/Diminished Fifth), which is six Semi-tones above the Tonic.

Now we come to the Dominant (or Major Fifth) note. This is seven Semi-tones above the Tonic. It has somewhat of a pivotal role in the Western Scale as it is the note which also forms the basis for scales in each subsequent key, so long as that scale contains at least one sharp (#) (ex: in the Major Scale in C (C, D, E, F, G, A, B, C) the dominant (5th), G, is the starting point for the Scale in the Key of G (i.e: we take the last four notes of C Major (G, A, B, C) and add four more above them (D, E, F#, G) to give us the scale of G Major: G, A, B, C, D, E, F#, G. Note that the seventh (F) has been raised by a semi-tone to maintain the step pattern of the Major Scale (Tone, Tone, Semi-tone, Tone, Tone, Tone, Semi-tone)). For keys containing Flats (b) the Perfect Fourth (Sub-Dominant) is the starting point (hence: we take the first four notes of C Major (C, D, E, F) and then add four more (F. G, A, Bb) below them to give us: F, G, A, Bb, C, D, E, F. Note that in this case the four notes taken from C form the upper portion of the Scale, and the fourth (B) is lowered by a semi-tone. Again to preserve the Major Scale's step pattern).

After the Dominant comes the Sub-Mediant. Which is either eight (an Augmented Fifth/Minor Sixth) or nine (a Major Sixth/Diminished Seventh) Semi-tones above the Tonic.

Next we find the Sub-Tonic, also known as the Minor Seventh. This lies ten Semi-tones above the Tonic.

Just below the Octave is the Leading Note, aka the Major Seventh, which is eleven Semi-tones above the Tonic.

And finally (at long last) we have TA DA.. Ladies and Gentlemen.

THE OCTAVE!!!!, which is the same note as the Tonic but twelve Semi-tones higher!

Note: to find the lower octave just count backwards :D
 
littledog said:
Holy shit, Bear! Please post a pic of that mother of all pianos... I gotta see it!:eek:
Dammit -- 7+ octaves.... wasn't a good math day for me yesterday!!!

(88 keys / 12 notes in the scale)
 
Don' worry 'bout it Bruce - hey, we got 6-string basses now, sooner or later somebody'll come up with a 10-octave piano :=)

Don'cha just LOVE brain farts? I sure enjoy mine... Steve
 
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