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"This song is in F Major", "That song is in A Minor", "This song is in D Minor, but modulates to F Major in the middle", etc.

Can we say "This song has no key"? Are there songs that have/follow no key? Is it possible to create song without adhering a key?

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You may be interested in atonal music, see en.wikipedia.org/wiki/Atonality –  Joseph Weissman Jul 30 '11 at 16:19
    
Ask MetaFilter has more on atonal music and modulation (the technical term for key changes). –  Tobu Jul 31 '11 at 8:33
    
IIRC Bartok said "finally, free from the chains of major and minor" (that is a translation of a translation). –  11684 Nov 3 '13 at 21:51

8 Answers 8

up vote 35 down vote accepted

First, a key is only really a basis. You can have an F# in a piece written in C Major without having the piece "switch" keys.

Second, keys are defined arbitrarily. Sure there is theory about what sounds good and that sort of thing, but at the end of the day it's just a group of notes that's just as valid as any other group of notes. This is made clear by modes where you have 7 different scales starting on F, 7 starting on G, etc.

There's also plenty of non-Western music that doesn't even use the same notes and intervals as us, so applying our concept of keys to that music doesn't make sense, although they may have their own analog to keys.

And it's entirely possible to compose music outside a currently-named key. I'll compose a song right now based on arbitrary frequencies:

0.001 Hz    2342.234582999 Hz    11 Hz    201.42 Hz    600 Hz    9876.123 Hz

In sum, your question amounts to "Is it possible to type a letter sequence that isn't an English sentence?"

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Nice melody. Can you base a symphony on it now? –  Andrew Jul 29 '11 at 20:49
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@Andrew Yes, just repeat it 600 times and then once backwards. –  Matthew Read Jul 29 '11 at 20:52
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@Matthew, your answer, specially your analogy to English sentence, is really informative, educational, and helpful. Thank you very much. –  Saeed Neamati Jul 30 '11 at 17:54
    
@Saeed Glad to help :) –  Matthew Read Jul 30 '11 at 20:21
    
Your song: What the actual what. –  Kevin Nov 3 '13 at 20:56

A drum solo is a song without a key.

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Nice point @Mark. Really nice. –  Saeed Neamati Jul 30 '11 at 17:55
    
Nice! +1 Insightful –  Matthew Read Jul 30 '11 at 20:23
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Unless the drums are tuned/pitched, though even then maybe not. –  Rob Aug 1 '11 at 22:53
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One could take the position that a "song" must be something that can be "sung". Hence, pitched vocals. –  slim Sep 20 '11 at 11:21

"Key" implies "tonality." The name of a key corresponds to a pitch class that is considered the "focus" of a key or section.

Is it possible to compose a melody without a key? Of course. That was the whole point of the Second Viennese School. Of course, it is possible not to be tonal (which implies a specific framework of relationships surrounding one central pitch) and still to be centric (which implies that a pitch is central, but the "Western" tonal framework around it is still not there). It is also possible to have multiple pitches serve as centric (an example is polytonality, though it is possible to eschew tonality and still have polycentrism).

All of what I have just stated falls within the Western equal-tempered twelve-tone system. As @Matthew Read points out, you can go outside that system as well.

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To add to the other answers, there is also dodecaphony, or twelve-tone technique, a method to compose music explicitly without a key by trying to give equal weight to all 12 notes of the western scale.

Hauer - Nomos Op. 19, beginning (Look ma, no key)

Another example: YouTube: Arnold Schönberg: Suite op. 25 / Musette

Surely sounds interesting, but this kind of music is definitely more for the mind than for the heart. ;-)

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Possible, yes. Recommended, probably not.

As other answers have stated, it is certainly possible to write a song that does not conform to defined tonal "scales" like the Ionian mode (major scale) and related modes, pentatonic scales, and variations like harmonic and melodic minor (which differ from "natural minor", the Aeolian mode, in a couple subtle ways such as a major 6th or 7th).

If a melodic line does not generally conform to one of the above, it is generally termed "atonal". However, it can still conform to a system; music written in the whole tone or tritone scales, for instance, or in Middle Eastern and Indian systems which utilize quarter-tone differences. Whole tone and tritone music can still be written in Western notation, but many Eastern styles cannot.

Then, there are music styles that defy printed form; many traditional African call-and-answer styles were passed down for thousands of years solely through word of mouth, and completely lack a tonal center, focusing instead on rhythm and flow of the song. With the sweeping popularity of Western culture and musical instruments, particularly keyboards and synthesizers, a lot of African music has become more systematic, but you still hear very odd intervals reminiscent of the traditional songs.

In all cases, the Western music notation system evolved to handle Western music styles, which use the 12-tone system, key and time signatures. Even then, some contemporary music styles, especially a capella choral music and jazz, can make a pianist cringe when told to decipher it in condensed staff form.

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I think the end of your second paragraph got truncated. –  Matthew Read Jul 29 '11 at 22:59

There are songs that might as well not have a key, with so many accidentals that it basically becomes tonal soup. However, even those have a key to start with.

A key signature simply tells you eight of the twelve normal tones the song is written to use. You wouldn't be able to write down a song in normal notation without establishing what tone the spaces and lines on the staff meant.

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It happens all the time.

At the risk of borrowing from one of my recent contributions - the tritone sound pulls a listener's ear in a meaningful way to a tone that's one half-step up from the involved notes. If we play a C-F# interval, music theory tells us that the most satisfying resolution to this interval will either be (enharmonically) to Db or to G. You can imagine a guitarist or a pianist simply holding a C-F# and then not moving their hands/fingers and simply adding the 'missing' root of the chord; D-C-F# implies D7 which is the V7 of G major, while Ab-C-Gb(AKA, F#) is the V7 of Db major.

This, along with the idea of relative minors and other substitutions, allows people to 'justify' all kinds of interesting changes, without even doing a ton of modulation. Consider the fairly common chord progressions of I -> III7 -> IV, or I -> III7 -> vi. Or to contextualize them a little bit, C -> E7 -> F // C -> E7 -> Amin. E7 contains a G#, which is not in C Ionian or A Aeolian; however, it is the V7 of an A minor chord. With A minor being relative to C major, as well as being squarely between F major and C major on the circle of fifths, sort of gives it what I'd consider an 'auditory seal of approval'. (I'm sure there's a better term for what's occurring there, but really think about it; F + A minor = a neatly stacked Fmaj7. C + A minor = C6, but it's got a big M6 between the root and the 6. This doesn't result in the death of a family member or anything, but it is just interesting food for thought IMO.)

Anyway. Even outside of songs which modulate to go to the bridge, or to close the song on a different emotional level than it started, consider a tune like Giant Steps. Coltrane is basically 'switching' so often between Eb, G, and B that it is just about useless to call the song as being in any key. In particular if you attempt to improvise over it; those Eb licks will not serve you very well over a ii-V-I in G. It doesn't really inform anyone's playing to consider the song as having a single key.

Atonality doesn't have to play into it; there's no need to look into tone rows unless you're really looking for something different to play around with. There's a ton of jazz which critically redefined the mentality of playing 'in key'. People cite Kind Of Blue as being a landmark album for a reason; it pushed a lot of what informs people's modern sensibility on how to improvise with both the motion of the chords as well as the sound of the song in the moment; as opposed to committing oneself to learning how to solo over every ii-V7 progression as if they were static chord changes that cannot be deviated from.

This has gone on to inform a lot of genres' approach to music. Consider every cookie-cutter forgettable Top 40 'hard rock' band you've ever heard which makes use of drop-D tuning and that Eb5 power chord to 'return' to the D5. That's chord substitution without the tritone interval to 'justify or explain' the placement of a b2 in a 'key' that would otherwise have sounded to relative to D minor instead of "D diminished, until it isn't." The tonic might be D, but that's not a key, it's a note.

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You have to understand that Keys are not arbitrary. The musicians have through countless hours experimentation over the centuries come to the realization of what makes beautiful music. This system we have is not intended to stifle creativity but to promote it. Everything your theory teacher teaches you is with the ambition to get you to make and perform beautiful music.

To answer your question on whether we can make music without a key. I would say that key is just a series of notes with semitone and wholetones in a specific order. So no matter what the pattern is or how many times it changes it still constitutes a key of some sort.

Also if you get to the advance stages of theory training you will learn that composers do not modulate purely for modulations sake. Their is certain ways you should be doing it and again it is not arbitrary. It is just one of the ways a composer can help tell the story of the music he is making.

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