Sonic-ChordProgression

function for Sonic Pi to create a chordprogression (ring of different chords)

Syntax

getProgression(root_note, progression_string, :key)

for example:

getProgression(60, 'I-IV-V-VI', :maj) # => (ring (ring 60, 64, 67), (ring 65, 69, 72), (ring 67, 71, 74), (ring 69, 72, 76))
                                      #     ring (C maj,             F maj,             G maj,            a min) 

Syntax - Elements

• root: can be a integer (60), symbbol (:C4) or String ('C4')
• progression_string
  • roman numerals fom I to VII
  • optional: s or b for sharp or flatten e.g. IIs
  • optional: number for the octave e.g. IIs2 or II6
  • optional: invert-parameter (e.g. i2 for second inversion of the chord) or chordname (e.g. 'sus2') in round brackets e.g. II(sus2, i3)

Usage

1. clone or download the repository
2. require 'path/to/progression_gen.rb'
3. create a progression like progression = getProgression(60, 'I-IV(i4)-V(add9, i2)-IV')

ToDo

• improve code