Trachytonic
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**Screamapillar** is a 7-note MODMOS in [[17edo]] (or its close cousins like [[27edt]] or [[44ed6]]). Screamapillar has three different step sizes and is described as a LLmmLLs scale (i. e., 3322331). As such, it is not a maximally even scale (since seconds, thirds, sixths, and sevenths all come in three rather than two sizes). However, screamapillar is notable for being [[Rothenberg propriety|strictly proper]], whereas the 17edo diatonic scale is not proper at all, and the 12edo diatonic scale is proper but not strictly so. Screamapillar can be obtained by a single chromatic modification of the diatonic scale; if we take 17edo's diatonic major (Ionian) mode, and raise the fourth by one step, we get screamapillar (specifically, the Springfieldian mode). Screamapillar is also one modification away from the [[Mohajira|rast]] scale, so it has resemblance to both Western and Middle-Eastern scales. Screamapillar is named by analogy with [[scorp]] (as both are arthropod creatures starting with "sc"), and also because the major fourth of 17edo (which functions as 11:8, among others) has a very bright sound as though it is "screaming"'; ambulance sirens often use similar intervals. Timbres where the eleventh harmonic is strong tend to take on a similar character. The sharpened fourth could also be called a "red note" (opposite of a blue note) due to the mood it creates. Also, the //[[https://en.wikipedia.org/wiki/The_Simpsons_Theme|Simpsons theme]]// uses a scale which, although not exactly screamapillar, does contain a sharpened fourth. [[image:http://38.media.tumblr.com/7826da01fcce799fc36142847120597e/tumblr_mhg2qvcEiY1qe9qrbo4_250.gif]] Because screamapillar is so similar to the diatonic scale, it's not as xen as one might expect a no-fives 13-limit system to be, and as a result it makes a good starting point for someone who wants to explore these higher harmonies without sounding too foreign. Screamapillar contains five types of tertian (root-third-fifth) triads. These include 2 supermajor, 2 subminor, 1 neutral, 1 neutral-diminished, and 1 subminor-diminished. Of these, the neutral triad is harmonically somewhat rough and so it might be a good idea to modify it, fortunately, there are several options for doing this, such as changing it to a sus2, sus4, or even sus4add2. On the other hand, the neutral-diminished triad is actually very nice sounding since it very closely approximates 9:11:13, and its fifth is still clearly a fifth (albeit a narrow one) rather than being ambiguous like the 12edo tritone. The subminor and supermajor chords can be harmonically stabilized by adding, respectively, the 4th [[https://en.wikipedia.org/wiki/Mu_chord|or the 2nd]]. This especially makes a difference in the latter case because supermajor triads sound somewhat unstable on their own. Other high-limit chords can also be realized in screamapillar, including the approximations of 8:9:11:12 (which is like a sus chord but with more tension) and 12:13:14:16:18. The modes of screamapillar could be given Simpsonsesque names as follows: **Springfieldian**: Modified Ionian (major). 3 3 2 2 3 3 1 **Swartzwelderean****:** Modified Dorian. 3 2 2 3 3 1 3 **Capitalcitian:** Modified Phrygian: 2 2 3 3 1 3 **Northhaverbrookian:** Modified Lydian: 2 3 3 1 3 3 2 **Shelbyvillean:** Modified Mixolydian: 3 3 1 3 3 2 2 **Ogdenvillean****:** Modified Aeolian: 3 1 3 3 2 2 3 **Spittlean**: Mo**<span style="line-height: 1.5;">e</span>**<span style="line-height: 1.5;">dified Locrian: 1 3 3 2 2 3 3</span>
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<html><head><title>Screamapillar</title></head><body><strong>Screamapillar</strong> is a 7-note MODMOS in <a class="wiki_link" href="/17edo">17edo</a> (or its close cousins like <a class="wiki_link" href="/27edt">27edt</a> or <a class="wiki_link" href="/44ed6">44ed6</a>). Screamapillar has three different step sizes and is described as a LLmmLLs scale (i. e., 3322331). As such, it is not a maximally even scale (since seconds, thirds, sixths, and sevenths all come in three rather than two sizes). However, screamapillar is notable for being <a class="wiki_link" href="/Rothenberg%20propriety">strictly proper</a>, whereas the 17edo diatonic scale is not proper at all, and the 12edo diatonic scale is proper but not strictly so.<br /> <br /> Screamapillar can be obtained by a single chromatic modification of the diatonic scale; if we take 17edo's diatonic major (Ionian) mode, and raise the fourth by one step, we get screamapillar (specifically, the Springfieldian mode). Screamapillar is also one modification away from the <a class="wiki_link" href="/Mohajira">rast</a> scale, so it has resemblance to both Western and Middle-Eastern scales.<br /> <br /> Screamapillar is named by analogy with <a class="wiki_link" href="/scorp">scorp</a> (as both are arthropod creatures starting with "sc"), and also because the major fourth of 17edo (which functions as 11:8, among others) has a very bright sound as though it is "screaming"'; ambulance sirens often use similar intervals. Timbres where the eleventh harmonic is strong tend to take on a similar character.<br /> <br /> The sharpened fourth could also be called a "red note" (opposite of a blue note) due to the mood it creates. Also, the <em><a class="wiki_link_ext" href="https://en.wikipedia.org/wiki/The_Simpsons_Theme" rel="nofollow">Simpsons theme</a></em> uses a scale which, although not exactly screamapillar, does contain a sharpened fourth.<br /> <br /> <!-- ws:start:WikiTextRemoteImageRule:0:<img src="http://38.media.tumblr.com/7826da01fcce799fc36142847120597e/tumblr_mhg2qvcEiY1qe9qrbo4_250.gif" alt="" title="" /> --><img src="http://38.media.tumblr.com/7826da01fcce799fc36142847120597e/tumblr_mhg2qvcEiY1qe9qrbo4_250.gif" alt="external image tumblr_mhg2qvcEiY1qe9qrbo4_250.gif" title="external image tumblr_mhg2qvcEiY1qe9qrbo4_250.gif" /><!-- ws:end:WikiTextRemoteImageRule:0 --><br /> <br /> Because screamapillar is so similar to the diatonic scale, it's not as xen as one might expect a no-fives 13-limit system to be, and as a result it makes a good starting point for someone who wants to explore these higher harmonies without sounding too foreign.<br /> <br /> Screamapillar contains five types of tertian (root-third-fifth) triads. These include 2 supermajor, 2 subminor, 1 neutral, 1 neutral-diminished, and 1 subminor-diminished. Of these, the neutral triad is harmonically somewhat rough and so it might be a good idea to modify it, fortunately, there are several options for doing this, such as changing it to a sus2, sus4, or even sus4add2. On the other hand, the neutral-diminished triad is actually very nice sounding since it very closely approximates 9:11:13, and its fifth is still clearly a fifth (albeit a narrow one) rather than being ambiguous like the 12edo tritone.<br /> <br /> The subminor and supermajor chords can be harmonically stabilized by adding, respectively, the 4th <a class="wiki_link_ext" href="https://en.wikipedia.org/wiki/Mu_chord" rel="nofollow">or the 2nd</a>. This especially makes a difference in the latter case because supermajor triads sound somewhat unstable on their own.<br /> <br /> Other high-limit chords can also be realized in screamapillar, including the approximations of 8:9:11:12 (which is like a sus chord but with more tension) and 12:13:14:16:18.<br /> <br /> The modes of screamapillar could be given Simpsonsesque names as follows:<br /> <br /> <strong>Springfieldian</strong>: Modified Ionian (major). 3 3 2 2 3 3 1<br /> <br /> <strong>Swartzwelderean</strong><strong>:</strong> Modified Dorian. 3 2 2 3 3 1 3<br /> <br /> <strong>Capitalcitian:</strong> Modified Phrygian: 2 2 3 3 1 3<br /> <br /> <strong>Northhaverbrookian:</strong> Modified Lydian: 2 3 3 1 3 3 2<br /> <br /> <strong>Shelbyvillean:</strong> Modified Mixolydian: 3 3 1 3 3 2 2<br /> <br /> <strong>Ogdenvillean</strong><strong>:</strong> Modified Aeolian: 3 1 3 3 2 2 3<br /> <br /> <strong>Spittlean</strong>: Mo<strong><span style="line-height: 1.5;">e</span></strong><span style="line-height: 1.5;">dified Locrian: 1 3 3 2 2 3 3</span></body></html>