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aloysius

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Species Counterpoint

github.com/srmullen/aloysius

srmullen/aloysius

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Aloysius ======== [Gradus Ad Parnassum](http://www.opus28.co.uk/Fux_Gradus.pdf) Intervals --------- - Unison: Perfect - Second: Dissonance - Third: Consonance - Fourth: Dissonance - Fifth: Perfect - Sixth: Consonance - Seventh: Dissonance - Octave: Perfect Motion ------ - Direct: When two or more parts ascend or descend in the same direction by step or by skip. - Contrary: When one part ascends by step or by skip and the other descends. - Oblique: One part moves by step or by skip while the other part remains stationary. Fundamental Rules ----------------- 1. From one perfect consonance to another perfect consonance one must proceed in contrary or oblique motion. 2. From a perfect consonance to an imperfect consonance one may proceed in any of the three motions. 3. From an imperfect consonance to a perfect consonance one must proceed by contrary or oblique motion. 4. From one imperfect consonance to another imperfect consonance one may proceed in any of the three motions.