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My question relates to playing a song with chords. Why would I want to shift a key up or down when I can just play a song in its original key with higher or lower sounding chord voicings? I also understand that if I'm playing open chords on a guitar and shift up or down a key and play its open chords that it won't necessarily sound higher or lower because the voicings are different. For instance, if I play the open chords of I,IV, and V in one key, then shift to another key and play its open chords, the song basically sounds the same because the chord progressions are the same, so why would it matter what key I'm playing in if it's not gonna shift the same voicing up higher or lower? Why would you change a songs key if you're not going to use the same chord voicings of the original key? And why shift key when you can play higher sounding voicings of the same chord? Is the answer because each different major key has a different mood?

  • Changing chord voicings alters the sound in a completely different way than altering the key does, and they're independent concepts. – Matthew Read Mar 16 '16 at 20:07
  • Could you explain in a little more detail, Matthew? Thanks. In the key of c playing a c chord, an f chord, and a g chord, instead of shifting the key up for a higher sound couldn't I just use a couple higher notes in each chord? And what would be the difference in playing I,IV, and V chords in the open position in the key of c rather than playing the same chord progression with open chords in key of g because I've heard that both would work because they are utilizing the same chords in that key – Jordon Bowe Mar 16 '16 at 20:17
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Choosing another key is a different operation from choosing other voicings in the same key, or playing the same stuff an octave higher or lower. It's useful to know how to do both things.

Some reasons to try another key:

  • When playing with a singer, or when you're singing: A song that is difficult to sing in one key might be easy and/or sound better for the singer's voice in another key.
  • For effect: You might just find that a piece sounds better in a different key
  • For ease of playing: A particular tune might just lay really well on your instrument in another key.
  • For variety - in playing a bunch of songs, listeners might get bored if all the songs are in the same key. In that case you can consider putting some of the songs into different keys for variety.
  • It's also sometimes useful to be able to modulate to another key within a tune for effect. This can be built into a tune or it can be an arrangement technique. It can be used to create additional interest or excitement.
  • A lot of jazz and classical music pieces will move through two or more keys. Again, this tends to make things more interesting.

Some reasons to try other chord voicings:

  • For less awkward fingerings
  • For better voice leading
  • To make things sound different or more interesting.
  • If I know my vocal range is from some note to another note, couldn't I play in any key and just make sure to use notes in that range? Or would some keys still sound better or worse than others regardless? – Jordon Bowe Mar 16 '16 at 23:01
  • Excellent answer. Plus 1. Not sure it helped OP but will help others. – Rockin Cowboy Mar 17 '16 at 0:26
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Regardless of the chord voicings you use in a song, the underlying melody will be the same if you keep it in the same key. Regardless of the chord voicings you use, the underlying melody will be higher (octave shifts notwithstanding) if you play the song in a higher key and lower if you play the song in a lower key.

The chords by themselves without the melody may sound lower or higher depending on the chord voicings. But if you try to sing or play lower or higher melody notes over the same chord - it will not work (unless you go lower or higher by one whole octave) You still use the same exact melody notes in the song - regardless of chord voicing. If not, the chords won't go with the melody. You can't just randomly pick any I or IV or V chord and sing or play melody notes in any key you want and expect it to work!

So if the song is in the key of G, the part of the melody that is played or sung when a G chord is being sung, will be the same exact notes (not higher or lower) whether you play an open G in 1st position, or a G barre chord on the tenth fret. The chord voicing will sound higher - but the melody notes that the singer sings are exactly the same. Of course you could sing the melody notes an octave or two higher (if you had the range) but you could do that regardless of what voicing of the chord you were singing over.

In any given song, the melody (notes that are sung if the song has words) and harmony (chords) work together to create the essence and feel of the song. If you want to sing a song a few steps higher or lower, you will have to change the key. If you change key, all the chords will change accordingly. Different voicings may serve you will if you want to sing the melody a whole octave higher or lower - but the notes will still be the same (only one octave higher or lower).

  • This helped me quite a bit thanks for your help. I just have one more question. So if I am playing in the key of c major playing a melody and singing with if that goes C,D,E and shift and play it the same way an octave higher, I can sing it exactly the same right? But what if I shifted that key to d major and played the notes d,e, and f sharp? Since the melody of c major stays the same even in different octaves, when shifting to d, how would I know to sing higher or lower than playing it in the key of c? Would either work? Hope that made decent sense. – Jordon Bowe Mar 17 '16 at 1:44
  • Also, if I'm singing over a c chord, and I switch to the key of d and play a d chord, in a voicing different than the c chord, containing notes higher and lower than the c chord, how would I know to sing lower or higher? – Jordon Bowe Mar 17 '16 at 2:14
  • Chords are made of notes from the key of the song. There will usually be some predominate notes sounding in your chord that are the same notes that are in the melody that is sung over that particular chord. So you will hear the new melody notes in the chord that is in a different key. Even though the notes may be in a different octave (depending on the chord voicing) - you should be able hear the notes and sing them in whichever octave you choose. If you can't - you need to work on your tone detection skills. Learn to hear a note and sing it in a different octave. Practice that. – Rockin Cowboy Mar 17 '16 at 7:34
  • @JordonBowe - with due respect, your lack of experience is getting in the way of practicality. Whatever key you sing a song in, your voice will most likely adjust, and you'll sing in the appropriate octave. Your ears will also tell you if it sounds 'right'. – Tim Mar 17 '16 at 17:23
  • So if I were to write a song, would I start with lyrics and identify what key I'm singing in then form chords based on that? Or would I start playing chords in any key and try to sing something that sounds good over those? Or would either work – Jordon Bowe Mar 17 '16 at 17:57

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