What does 'key' mean in music?

O--k-a-a-y. This could take a while... Basically, it's something hard-wired into us. Our ears (and the part of the brain that interprets sound) work in such a way that certain sounds seem related. For instance, if you double the frequency of a sound, it seems to sound like the same sound on a different "level." This is what we call two "notes" being an "octave" apart. I'm sure you've heard that... All right, then. Within an "octave," certain other sounds, um, well, sound "right," either together or in some relationship. I remember hearing a sound bite of Leonard Bernstein lecturing on this once--he pointed out the the "tune" you associate with (in English) the little-kid insult-chant "nyah, nyah" can be heard anywhere in the world. Those two "notes" seem to go together, and almost any human being will tell you so. And there are other "notes" that also seem to work well with those two. You play with the math (and the sounds), and you end up with a "scale"--a set of notes that "go together" in different ways because they have a certain mathematical "family resemblance." Using those notes in the right sequence, you can trigger emotional responses in other people. It's a form of communication that is--partly--independent of words. Now, if you're going to write all this down, or even agree with the guy next to you (so you can play your flute and he can play his harp and it will sound right together), you're going to have to arbitrarily pick some particular sound and say that's the "key" note. Once you have that note, the rest of them can be derived from it. We in the West have a particular set of sounds (and in particular, a single note) that everyone has agreed to treat as the standard, and all keys, chords, notes, etc., are derived from that standard. So, sort of, a "key" is short for "the set of notes derived from THIS note to form THIS kind of scale." Um, that's the other problem. Kinds of scales. Y'see, the emotional reaction you get from a set of notes in a song can be different depending on the exact notes in it. The two most obvious ones are the "major" keys (the classic "do-re-mi" stuff that most songs are written in if you don't think about it), which generally sound "happy" or "neutral," and the "minor" keys, which--again generally--sound "sad" or "thoughtful." So you're talking about an arbitrary set of sounds, related in a way that isn't arbitrary at all to someone who hears them. I hope this makes a little sense...

a key in music is the tuning of the instrument that is being played. for instance, i play guitar and keyboards, if i need to change the "key" that i am playing my guitar in to fit my voice, or another singers voice, i can either re-tune my guitar to another tuning instead of the normal "A" 440MHz, to say "G" 415 MHz, or i can put a capo around the neck of my guitar on the 3rd fret. on keyboards, all you have to do is change the chording structure. if you are playing in "G" below middle "C" and you need to play it in "Em" for instance, just transpose the notes 2 notes down. I hope this helps

Is not that complicated. A key is the scale on which a piece of music is writteh, think of a key as the solar system... the sun being the key, and the planets are the rest of the sounds of a scale. For example, if a song is in D major, the most important note and chord of that song would be D, all of the others sounds revolve around it.. just like the planets do around the sun. The song may wander off D.. but it will always go back to it. And at the end.. you happily arrive to that D chord.. which pleases your ears, and gives you a sense of satisfaction.

A key is a notation which tells which notes a song will use. It can also shape the way that a song sounds. It's easiest to understand when visualizing the keyboard of a piano. If somebody is playing a song using the white keys alone, they are playing in the "key" of either C or A minor. This is possible because on the white keys, going from C and pressing each white key until the next C produces the scale of C major. Going from A to A produces quite a different sound, and this is A minor. The key of a piece of music is determined by the number of sharps or flats at the beginning of the staff. A major key is constructed by starting at the starting note, and then following the pattern: whole step, whole step, half step, whole step, whole step, whole step, half step. With a whole step, you skip one key, and with the half step, you press the immediate next key. You can start on any key, follow this pattern and you will construct a major scale. Sometimes, a note is written that is not in the key of the piece. This is indicated by a sharp or flat preceeding the note. This is called an accidental. Sometimes the music may change key and this is called a modulation. In the end, keys are simply a tool for composers to produce a piece with a certain sound in a certain range. Music may also be switched to a different key to facilitate singing. For example, a piece written for a tenor may be transposed to let an alto sing it. This doesn't change the quality of the piece, but it moves it up or down to allow others to sing it.

Since you don't have a working knowledge of music theory, the easiest way to explain "key" is to call it the beginning and destination of the piece. For example a piece in "A" (whether major or minor) will end on an A chord and usually start with one. The pitch named in the key is the most important note in the piece. It will sound like a natural resting place and the melody and harmony are based on moving away from and then back to this note. The major or minor designation is an indication of which scale notes have half steps between them. A half step is two adjacent piano keys such as F sharp (F#) and G or B and C; a whole step skips one piano key (F to G or B to C#). Basic scales have 5 whole steps and 2 half steps If you are familiar with singing syllables, a major scale starts Do, Re, Mi, . . . and a minor scale starts La, Ti, Do, . . . . An A major scale has the notes A, B, C#, D, E, F#, G#, A. An A minor scale has the notes A, B, C, D, E, F, G, A. A piece in a minor key will often have the 7th and sometimes 6th note of the scale raised (G# and F# in A minor) part of the time for a more flowing and pleasant melody and harmony. The "key signature" of a piece refers to the number (if any) of sharps or flats at the beginning of the score. Each key signature has two keys associated with it one major and its relative minor. For example the keys of C major and A minor both have no sharps or flats. Whether the key of the piece is major or minor is determined by which note is the focal point or "tonal center". So the key of a piece tells you which notes are sharp or flat and what note is most important.

its how high or low you sing something, like octave. if your a soprano you sing a higher key, if your an alto you sing a lower key

OK. A 'key' is a set of notes, usually 8 (an octave). The key of C starts with the C note and progresses up: C D E F G A B - it's by far the simplest 'key' to remember because it has no sharps or flats (notes inbetween the letters - sharp is up 1/2 tone, flat is down 1/2 tone). It is a major chord, in that it sounds upbeat... minor keys tend to sound darker or more moody. Most music lessons start out with locating/playing the C note, then the C major 'scale' -- all 8 notes from C upwards. Now, here's the trick. Not all the notes are exactly a whole 'step' apart... two of them are only a half step. So... if you shift to another key, say... A... then you would start at A and progress up through G. Along the way, you would have to sharp (raise 1/2 step) or flat (lower 1/2 step) two of the other notes to make them sound 'right' and stay within that major scale progression. This is what's called a 'transposition'... taking notes written in one key and adjusting them all to play in another key. When someone refers to a "minor" key... what they mean is that the notes have been adjusted to play that moody 'minor' scale, rather than the standard 'major' scale. You'll start at the same 'root' - C... but then might play D-flat instead of D, progress to E, then F, then G-flat, then A and B. So... when you say something is in the Key of C Minor... they're telling you that certain notes will be adjusted to fit the minor progression, instead of the major which is assumed. Listen to the "Moonlight Sonata" -- it does several shifts from minor to major and back again, and you can definitely tell when the 'key' changes even though it carries the same root for most of the piece.

a scale or pitch. example in tune.