24edo/Interval names and harmonies
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24 EDO or 24 ET divides the octave into 24 equal parts and is also a multiple of twelve, therefore, 24 EDO contains all of the original harmonies found in 12 EDO. This page seeks to explore the new harmonies available in a 24 Tone system. =Tone Sizes= While 12 EDO contains only two tone sizes: the whole tone at 200 cents, and the semitone at 100 cents, 24 EDO contains five being that it has three additional new tone sizes. Generally, as it divides the octave into 24 parts, it's a good idea to approach intervals and tones with this mindset of there being a new wider or narrower version of the previous intervals. ===Quarter Tone=== The quarter tone is the smallest tone size in 24 EDO. At only 50 cents, It is a highly dissonant interval and has a characteristic washy, beating sound to it resembling an out of tune instrument. Melodically it can function similar to the way a semitone does in 12 EDO but it tends to sound really different as it's such a small interval. Due to the high dissonance, this interval almost never sounds good in a chord in the context of tonal music but can work quite well for composers who wish to explore the dissonance of 24 EDO. Through chord changes, the quarter tone is very effective in creating a sound of a record player going in and out of pitch. It can be a nice effect in smooth jazz progressions or post-modal music to simply move a diatonic chord from 12 EDO up a quarter tone as quarter tone root movement is quite novel in sound. ===Whole Tones=== 24 EDO there are not one, but two distinct sizes of whole tones. The wide tone at 250 cents, and the narrow tone at 200 cents, therefore the narrow tone is exactly the same interval that appears in 12 EDO as a whole tone. The wide tone generally has a more metallic sound than the narrow tone as well as a more moody character compared to the brightness of the narrow tone. In context of a major chord, the wide tone brings a much colder flavor to the major chord than the narrow tone which enhances the brightness of the major chord. The wide tone from the root clashes heavily with minor chords as the minor third and the wide tone are only a quarter tone apart. Diatonic chords tend to move naturally by wide tone movement such as moving an Am chord to an Gd major chord. The wide tone is fairly unique to 24 EDO as in it's too narrow to be considered a good 7/6 and fits more as being described as a 15/13. ===Semitones=== Like whole tones, there are two distinct sizes of semitones in 24 EDO: The narrow semitone at 100 cents and the wide semitone at 150 cents. While the narrow semitone is exactly the same as the 12 EDO semitone, the wide semitone (also called the neutral tone) is unique. More often the wide semitone is called the neutral tone as it lies directly between a major and minor second. The neutral tone is heavily used in persian, turkish, and other forms of eastern music as well as some east asian scales. The character of the neutral tone resembles the sound of bells, a car horn, and other sounds that are normally considered "non-musical". If fact, the dialing tone in the US is fairly close to a 150 cent neutral tone so I guess you could call it a "dial tone" hehe.
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<html><head><title>24 EDO Interval names and Harmonies</title></head><body>24 EDO or 24 ET divides the octave into 24 equal parts and is also a multiple of twelve, therefore, 24 EDO contains all of the original harmonies found in 12 EDO. This page<br /> seeks to explore the new harmonies available in a 24 Tone system.<br /> <br /> <!-- ws:start:WikiTextHeadingRule:0:<h1> --><h1 id="toc0"><a name="Tone Sizes"></a><!-- ws:end:WikiTextHeadingRule:0 -->Tone Sizes</h1> While 12 EDO contains only two tone sizes: the whole tone at 200 cents, and the semitone at 100 cents,<br /> 24 EDO contains five being that it has three additional new tone sizes. Generally, as it divides the octave into 24 parts, it's a good idea<br /> to approach intervals and tones with this mindset of there being a new wider or narrower version of the previous intervals.<br /> <br /> <!-- ws:start:WikiTextHeadingRule:2:<h3> --><h3 id="toc1"><a name="Tone Sizes--Quarter Tone"></a><!-- ws:end:WikiTextHeadingRule:2 -->Quarter Tone</h3> The quarter tone is the smallest tone size in 24 EDO. At only 50 cents, It is a highly dissonant interval and has a characteristic washy, beating sound to it resembling an out of tune instrument. Melodically it can function similar to the way a semitone does in 12 EDO but it tends to sound really different as it's such a small interval. Due to the high dissonance, this interval almost never sounds good in a chord in the context of tonal music but can work quite well for composers who wish to explore the dissonance of 24 EDO. Through chord changes, the quarter tone is very effective in creating a sound of a record player going in and out of pitch. It can be a nice effect in smooth jazz progressions or post-modal music to simply move a diatonic chord from 12 EDO up a quarter tone as quarter tone root movement is quite novel in sound.<br /> <br /> <!-- ws:start:WikiTextHeadingRule:4:<h3> --><h3 id="toc2"><a name="Tone Sizes--Whole Tones"></a><!-- ws:end:WikiTextHeadingRule:4 -->Whole Tones</h3> 24 EDO there are not one, but two distinct sizes of whole tones. The wide tone at 250 cents, and the narrow tone at 200 cents, therefore the narrow tone<br /> is exactly the same interval that appears in 12 EDO as a whole tone. The wide tone generally has a more metallic sound than the narrow tone as well as a more moody<br /> character compared to the brightness of the narrow tone. In context of a major chord, the wide tone brings a much colder flavor to the major chord than the<br /> narrow tone which enhances the brightness of the major chord. The wide tone from the root clashes heavily with minor chords as the minor third and the wide tone are only a<br /> quarter tone apart. Diatonic chords tend to move naturally by wide tone movement such as moving an Am chord to an Gd major chord. The wide tone is fairly unique to 24 EDO as in<br /> it's too narrow to be considered a good 7/6 and fits more as being described as a 15/13.<br /> <br /> <!-- ws:start:WikiTextHeadingRule:6:<h3> --><h3 id="toc3"><a name="Tone Sizes--Semitones"></a><!-- ws:end:WikiTextHeadingRule:6 -->Semitones</h3> Like whole tones, there are two distinct sizes of semitones in 24 EDO: The narrow semitone at 100 cents and the wide semitone at 150 cents. While the narrow semitone is exactly the same<br /> as the 12 EDO semitone, the wide semitone (also called the neutral tone) is unique. More often the wide semitone is called the neutral tone as it lies directly between a major and minor second. The neutral tone is heavily used in persian, turkish, and other forms of eastern music as well as some east asian scales. The character of the neutral tone resembles the sound of bells, a car horn, and other sounds that are normally considered "non-musical". If fact, the dialing tone in the US is fairly close to a 150 cent neutral tone so I guess you could call it a "dial tone" hehe.</body></html>