Class: JazzModel::Mode

Inherits:
Base
  • Object
show all
Includes:
KeyContext
Defined in:
lib/jazz_model/mode.rb

Overview

In music theory a mode is essentially a slice of a scale with an offset. For example second mode of the C major scale would begin and end on D but otherwise have the exact same tones as the C major scale.

This class represents a mode within the context of a Scale.

Associations

  • scale - The related scale.

  • chord_scales - ChordScale relationships to this mode.

  • chords - Direct access to a collection of chords through chord_scales.

Tones and Mode Context

Tones are directly related to scales, not modes. There is a tones method (and a notes method that delegates to tones) here that simulates the tones for the mode by setting the mode context of the scale tones, effectively returning the tones shifted by X where X is the mode number. Therefore, you can access tones directly off of the mode because they are proxied through scale with the correct offset.

Examples

Since modes should be accessed within the context of scales, mode-related examples are actually in scale. See Scale.

Instance Method Summary collapse

Methods included from KeyContext

included

Methods inherited from Base

load_definitions

Instance Method Details

#tones ⇒ Object 



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# File 'lib/jazz_model/mode.rb', line 38

def tones
	if self.key
		self.scale.tones.in_mode(self.mode).in_key_of(self.key)
	else
		self.scale.tones.in_mode(self.mode)
	end
end