Class: HeadMusic::Style::Guides::FuxCantusFirmus

Inherits:
SpeciesMelody show all
Defined in:
lib/head_music/style/guides/fux_cantus_firmus.rb

Overview

Rules for the cantus firmus according to Fux.

Constant Summary collapse

RULESET = 
[
  *MELODIC_CORE,
  HeadMusic::Style::Guidelines::AlwaysMove,
  HeadMusic::Style::Guidelines::EndOnTonic,
  HeadMusic::Style::Guidelines::MinimumNotes.with(8),
  HeadMusic::Style::Guidelines::MaximumNotes.with(14),
  HeadMusic::Style::Guidelines::FrequentDirectionChanges,
  HeadMusic::Style::Guidelines::NoRests,
  HeadMusic::Style::Guidelines::NotesSameLength,
  HeadMusic::Style::Guidelines::LargeLeaps.with(
    message: "Recover large leaps by step in the opposite direction.",
    minimum: :perfect_fourth,
    descending: {minimum: :perfect_fourth, forbidden: :minor_sixth},
    recovery: %i[consonant_triad opposite_step]
  ),
  HeadMusic::Style::Guidelines::StartOnTonic,
  HeadMusic::Style::Guidelines::StepDownToFinalNote
].freeze