Musical Intervals - Scales Vs. Chords
 Oct 10 2013, 10:51 AM Post #1 Theory Instructor Group: GMC Instructor Posts: 888 Joined: 8-January 13 From: Manchester UK Member No.: 17.394 Musical Interval LingoOne of the most common questions I get when it comes to talking about notes and intervals is, “How come a 2nd and 9th are the same thing, and when do I say 9th and when do I say 2nd?”To help answer these questions, here is a short primer on intervals when it comes to scales vs. chords, which should help tackle any issues when it comes to using different names for the same interval in any given key. The short answer is that when you are talking about scales you use the numbers 1 to 8 for each note in the scale, so a C major scale would be 1-2-3-4-5-6-7-8. Then, you use the numbers up to 13 when talking about chords. So, the notes of C major expressed as a chord in numbers are 1-3-5-7-9-11-13. Since scales are built in steps and use step-wise motion, we use ordered numbers, from 1 to 8, to talk about those notes. But, as chords are built in thirds, in that you stack every 2nd note on top of each other to produce the chord, we use stacked numbers from 1 to 13 to talk about the notes of a chord. Here is an example of a C major scale written as both a scale and as a chord, with the corresponding numbers below each note.As you can see, the numbers 1-3-5-7 line up to the same notes in either case. But, 2 and 9, 4 and 11 and 6 and 13 are the same notes but different numbers. This means that if you are talking about the note D in the C major scale you would call it a 2nd, but if you were talking about the note D in a C chord you would call it a 9th, the smaller number is used for the scale the larger number for the chord. So there is the short answer to the question, if you are talking scales use the numbers 1-8, if you are talking chords use the numbers 1-13. If you want to dig into these concepts further, here are some articles for further reading that you can explore in your own study. Theory Quick Start GuideMusical Intervals For GuitaristsMastering Major Scales for GuitarMastering Guitar Chord Theory -------------------- Ask me anything on the theory board. Follow my theory course. Check out my personal site
 Apr 16 2015, 03:35 PM Post #2 Learning Rock Star Group: Members Posts: 104 Joined: 28-November 09 From: Michigan/USA Member No.: 7.939 when you are using the number 1-13 to talk about a chord, why is it only odds? when talking about a scale you use all of the numbers. is it to keep it non chromatic because that would make the chord sound bad?
 Apr 17 2015, 04:01 PM Post #3 GMC Founder & Rocker Group: GMC Instructor Posts: 16.300 Joined: 15-August 05 From: Stockholm, Sweden Member No.: 2 Since chords are built by stacking thirds (=every other note starting from the first) - you won't come accross 2, 4, 6 etcHowever those notes are still contained within chords, because:9=211=413=6etcSo this is mostly a theoretical question, it's not that relevant when actually playing and constructing chords. And it does not relate to what you said about non chromatic. So the exact same notes are used when constructing the major scale, and when constructing chords from the major scale.Let me know if this makes sense? -------------------- Why you are better than you think
 Apr 17 2015, 06:32 PM Post #4 GMC:er Group: Members Posts: 3.489 Joined: 30-December 12 From: Los Angeles, CA Member No.: 17.304 +1 to what Kris just mentioned.*If you like you can think of it this way too ...For chords: 1 3 5 (7) make up the fundamental chord (maj, min, dom) and 2 4 6 can be extensions (9th, 11th and 13th).*We generally name/number the extensions above the octave (8) because most of the time (at least theoretically) they are played above the basic chord. Chords within the scale: 1 3 5 is the I major, 2 4 6 is the ii minor, 3 5 7 is the iii minor, 4 6 8 is the IV major, 5 7 9 (or 2) is the V major, etc.Odd > even > odd > even ... This post has been edited by klasaine: Apr 17 2015, 06:47 PM --------------------
 Apr 25 2015, 10:59 PM Post #5 Learning Apprentice Player Group: Members Posts: 6.711 Joined: 5-July 14 From: The Black Country, England Member No.: 19.975 I am discombobulated -------------------- MY CURRENT REVISION FOLDERSEE MY GMC CERTIFICATE“Success is not obtained overnight. It comes in installments; you get a little bit today, a little bit tomorrow until the whole package is given out. The day you procrastinate, you lose that day's success.” Israelmore Ayivor
 Apr 26 2015, 10:20 PM Post #6 GMC Founder & Rocker Group: GMC Instructor Posts: 16.300 Joined: 15-August 05 From: Stockholm, Sweden Member No.: 2 Hehe which part are you having problems with?If everything feels discombobulating to you, this is not the right place to start.You should first understand how chords and scales are constructed, before this topic will be relevant for you. Check out the links in The Professors opening posts to learn more about the basics. -------------------- Why you are better than you think

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