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/ romanchordprogressions.rb
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November 22, 2015 15:24
romanchordprogressions.rb (revision 3) This program explores the use of chord progressions notated using Roman numerals. A range of symbols are defined and two routines defined to parse these and produce the required chords. Works on SP 2.7. Sound File at https://soundcloud.com/rbnman/romanchordprogressions
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| #playing with chord progressions and their syntax by Robin Newman, November 2015 (rev 3) | |
| #recently I've been reading up on chord progressions, and representing them with a Roman notation. | |
| #This code is the result! | |
| #revision 2. (Removed some extranous development stuff) | |
| #revison 3. (reallocated synths for arpeglinear, typo correction, changed amp: setting for arpeg random) | |
| #first set up hashes of symbols, giving offsets for their base note | |
| DU= {:I=> 0,:II=> 2,:III=> 4,:IV=> 5,:V=> 7,:VI=> 9,:VII=> 11} #capitals for Major chords | |
| DU7= {:I7=> 0,:II7=> 2,:III7=> 4,:IV7=> 5,:V7=> 7,:VI7=> 9,:VII7=> 11} # 7th Major | |
| DUA= {:Ia=> 0,:IIa=> 2,:IIIa=> 4,:IVa=> 5,:Va=> 7,:VIa=> 9,:VIIa=> 11} #Major augmented |