Diamond-mos notation: Difference between revisions
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== Key signatures == | == Key signatures == | ||
[[File:5L3s LsLLsLsL key signature.png|thumb|298x298px|The 5L 3s key signature mentioned in this section.]] | |||
To change the tonic, we use the key signature of mos accidentals to indicate how many chroma-positive mos generators the tonic is above middle J = middle C. (A generator of a mos is called chroma-positive if the larger intervals in each generic interval class of the mos result from stacking the generator upwards. For example, the chroma-positive generator of [[5L 2s]] is the fifth, because the major third is 4 fifths up and the minor third is 3 fifths down.) | To change the tonic, we use the key signature of mos accidentals to indicate how many chroma-positive mos generators the tonic is above middle J = middle C. (A generator of a mos is called chroma-positive if the larger intervals in each generic interval class of the mos result from stacking the generator upwards. For example, the chroma-positive generator of [[5L 2s]] is the fifth, because the major third is 4 fifths up and the minor third is 3 fifths down.) | ||
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This means that the key signature should have three &’s, notated on the appropriate notes to represent the 42442424 scale on D. | This means that the key signature should have three &’s, notated on the appropriate notes to represent the 42442424 scale on D. | ||
The new tonic is K | The new tonic (D) is spelled K in this mode, and the notes will be K L& M N O& P Q& J K. So the key signature will have an & on L, O and Q. | ||
Similarly if your key is reached by stacking chroma-positive generators down, the number of generators taken to do so is the number of @’s in the key signature. | Similarly if your key is reached by stacking chroma-positive generators down, the number of generators taken to do so is the number of @’s in the key signature. | ||