{"id":18967,"date":"2019-02-19T00:00:00","date_gmt":"2019-02-19T08:00:00","guid":{"rendered":"https:\/\/www.hearandplay.com\/main\/?p=18967"},"modified":"2024-10-05T05:44:52","modified_gmt":"2024-10-05T13:44:52","slug":"a-lesson-on-9ths-11ths-13ths-what-are-ninths-elevenths-and-thirteenths","status":"publish","type":"post","link":"https:\/\/hearplaymain.wpenginepowered.com\/a-lesson-on-9ths-11ths-13ths-what-are-ninths-elevenths-and-thirteenths\/","title":{"rendered":"A Lesson On 9ths, 11ths, &amp; 13ths &#8212; &#8220;What Are Ninths, Elevenths, And Thirteenths?&#8221;"},"content":{"rendered":"<p>You&#8217;re on the right page if you&#8217;re interested in learning about 9ths, 11ths, and 13ths.<\/p>\n<p>Coming across 9ths, 11ths, and 13ths are inevitable while studying chords, and this is because beyond the level of triads and seventh chords are extended chords &#8212; which are classified into 9th chords, 11th chords, and 13th chords.<\/p>\n<p>The formation of these extended chords require what music scholars call extensions.<\/p>\n<p>Now for the sake of those who are just coming across the term <em>extension<\/em> for the first time, we&#8217;ll be getting started with this study by taking a look at what extensions are.<\/p>\n<h2><em>&#8220;What Are Extensions?&#8221;<\/em><\/h2>\n<h2>The Ninth Extension<\/h2>\n<p>The ninth extension is exactly the ninth scale tone in the major key; starting from the first tone of the scale. For example, using the C major (two octaves) as a reference:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,C,D,E,F,G,A,B,C,D,E,F,G,A,B,C&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><\/p>\n<blockquote><p>C\u00a0 \u00a0 D \u00a0\u00a0 E\u00a0 \u00a0 F\u00a0 \u00a0 G \u00a0\u00a0 A \u00a0\u00a0 B \u00a0\u00a0 C \u00a0\u00a0 <strong>D<\/strong> \u00a0\u00a0 E \u00a0\u00a0 F \u00a0\u00a0 G \u00a0\u00a0 A \u00a0\u00a0 B \u00a0\u00a0 C<\/p>\n<p>1\u00a0 \u00a0\u00a0 2\u00a0\u00a0\u00a0\u00a0 3\u00a0\u00a0\u00a0 4\u00a0\u00a0\u00a0\u00a0 5\u00a0\u00a0\u00a0 6 \u00a0 \u00a0 7\u00a0\u00a0\u00a0 8 \u00a0 \u00a0 <strong>9<\/strong>\u00a0\u00a0 10\u00a0 11\u00a0\u00a0 12\u00a0\u00a0 13\u00a0\u00a0 14\u00a0\u00a0 15<\/p><\/blockquote>\n<p>The ninth tone from C:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,C,,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;is D:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,,D,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n<strong>Attention:<\/strong> Keep in mind that D is also the second tone of the C major scale.<\/p>\n<p>The ninth extension can be associated with the second tone of the scale and this is because in the key of C major (which is our reference):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,C,D,E,F,G,A,B,C,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;the ninth extension which is D:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,,D,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;has the same letter name with the second tone of the scale (which is also D):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,D,,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\nBoth of them are just an octave apart from each other.<\/p>\n<p><em>&#8220;So, How Do You Determine The Ninth Extension In Any Given Key?&#8221;<\/em><\/p>\n<p>Using the second tone of the scale (in the key you&#8217;re in), you can determine the ninth tone. For example, in the key of Ab major:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,Ab,Bb,C,Db,Eb,F,G,Ab,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;where the second tone is Bb:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,Bb,,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;an octave above the second tone (which is also Bb):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,,Bb,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;is the ninth extension.<\/p>\n<p>Altogether, a ninth from Ab is Bb:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,Ab,,Bb,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><\/p>\n<h2>The Eleventh Extension<\/h2>\n<p>Using the C major (two octaves) as a reference:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,C,D,E,F,G,A,B,C,D,E,F,G,A,B,C&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><\/p>\n<blockquote><p>C\u00a0 \u00a0 D \u00a0\u00a0 E\u00a0 \u00a0 F\u00a0 \u00a0 G \u00a0\u00a0 A \u00a0\u00a0 B \u00a0\u00a0 C \u00a0\u00a0 D \u00a0\u00a0 E \u00a0\u00a0 <strong>F<\/strong> \u00a0\u00a0 G \u00a0\u00a0 A \u00a0\u00a0 B \u00a0\u00a0 C<\/p>\n<p>1\u00a0 \u00a0\u00a0 2\u00a0\u00a0\u00a0\u00a0 3\u00a0\u00a0\u00a0 4\u00a0\u00a0\u00a0\u00a0 5\u00a0\u00a0\u00a0 6 \u00a0 \u00a0 7\u00a0\u00a0\u00a0 8 \u00a0 \u00a0 9\u00a0\u00a0 10\u00a0 <strong>11\u00a0<\/strong>\u00a0 12\u00a0\u00a0 13\u00a0\u00a0 14\u00a0\u00a0 15<\/p><\/blockquote>\n<p>&#8230;the eleventh extension can be determined.<\/p>\n<p>The eleventh tone from C:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,C,,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;is F:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,,F,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n<strong>Attention:<\/strong> It is important to note that F is also the fourth tone of the C major scale.<\/p>\n<p>The eleventh extension can be associated with the fourth tone of the scale and this is because in the key of C major (which is our reference):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,C,D,E,F,G,A,B,C,D,E,F,G,A,B,C&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;the eleventh extension (which is F):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,,F,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;has the same letter name with the fourth tone of the scale (which is also F):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,F,,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\nBoth of them are just an octave apart from each other.<\/p>\n<p><em>&#8220;So, How Do You Determine The Eleventh Extension In Any Given Key?&#8221;<\/em><\/p>\n<p>The fourth tone of the scale (in the key you&#8217;re in), is associated with the eleventh tone. For example, in the key of E major:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,E,Fs,Gs,A,B,Cs,Ds,E,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;where the fourth tone is A:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,A,,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;an octave above the fourth tone (which is also A):<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,,A,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><br \/>\n&#8230;is the eleventh extension.<\/p>\n<p>Altogether, an eleventh from E is A:<br \/>\n<img decoding=\"async\" src=\"https:\/\/hearandplay.cc\/dynamic_image\/pianokeys.php?notes=,,E,,A,&amp;color=FFFF66&amp;size=2\" border=\"0\" \/><\/p>\n<h2>The Thirteenth Extension<\/h2>\n<p>The thirteenth extension is exactly the thirteenth scale tone in the major key; starting from the first tone of the scale. For example, using the C major (two octaves) as a reference:<\/p>\n<blockquote><p>C\u00a0 \u00a0 D \u00a0\u00a0 E\u00a0 \u00a0 F\u00a0 \u00a0 G \u00a0\u00a0 A \u00a0\u00a0 B \u00a0\u00a0 C \u00a0\u00a0 D \u00a0\u00a0 E \u00a0\u00a0 F \u00a0\u00a0 G \u00a0\u00a0 <strong>A<\/strong> \u00a0\u00a0 B \u00a0\u00a0 C<\/p>\n<p>1\u00a0 \u00a0\u00a0 2\u00a0\u00a0\u00a0\u00a0 3\u00a0\u00a0\u00a0 4\u00a0\u00a0\u00a0\u00a0 5\u00a0\u00a0\u00a0 6 \u00a0 \u00a0 7\u00a0\u00a0\u00a0 8 \u00a0 \u00a0 9\u00a0\u00a0 10\u00a0 11\u00a0\u00a0 12\u00a0\u00a0 <strong>13<\/strong>\u00a0\u00a0 14\u00a0\u00a0 15<\/p><\/blockquote>\n<p>The thirteenth tone from C:<\/p>\n<p>&#8230;is A:<\/p>\n<p><strong>Attention:<\/strong> Keep in mind that A is also the sixth tone of the C major scale.<\/p>\n<p>The thirteenth extension can be associated with the sixth tone of the scale and this is because in the key of C major (which is our reference):<\/p>\n<p>&#8230;the thirteenth extension which is A:<\/p>\n<p>&#8230;has the same letter name with the sixth tone of the scale (which is also A):<\/p>\n<p>Both of them are just an octave apart from each other.<\/p>\n<p><em>&#8220;So, How Do You Determine The Thirteenth Extension In Any Given Key?&#8221;<\/em><\/p>\n<p>Using the sixth tone of the scale (in the key you&#8217;re in), you can determine the thirteenth tone. For example, in the key of B major:<\/p>\n<p>&#8230;where the sixth tone is G#:<\/p>\n<p>&#8230;an octave above the sixth tone (which is also G#):<\/p>\n<p>&#8230;is the thirteenth extension.<\/p>\n<p>Altogether, a thirteenth from B is G#:<\/p>\n<h2>Final Words<\/h2>\n<p>The ninth, eleventh, and thirteenth extensions are associated with the second, fourth, and sixth tones of the major scale and this makes it easy for the extensions to be recalled or determined.<\/p>\n<p>Now that we&#8217;ve covered these extensions and how they are derived in this basic lesson, it is recommended that you proceed into the determination of these extensions in any of the 12 major keys.<\/p>\n<p>See you in the next lesson.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn about ninths, elevenths, and thirteenths in this introductory lesson.<\/p>\n","protected":false},"author":9,"featured_media":22380,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-18967","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-piano","post-wrapper","thrv_wrapper"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A Lesson On 9ths, 11ths, &amp; 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