Module: MTK::Lang::Intervals

Extended by:

PseudoConstants

Defined in:

lib/mtk/lang/intervals.rb

Overview

Defines a constant for intervals up to an octave using diatonic naming conventions (see en.wikipedia.org/wiki/Interval_(music)#Main_intervals)

Naming conventions

P#: perfect interval
M#: major interval
m#: minor interval
TT: tritone (AKA augmented 4th or diminished 5th)

These can be thought of like constants, but in order to succinctly distinguish ‘m2’ (minor) from ‘M2’ (major), it was necessary to use lower-case names for some of the values and therefore define them as “pseudo constant” methods. The methods are available either through the module (MTK::Core::Intervals::m2) or via mixin (include MTK::Core::Intervals; m2)

Constant Summary

INTERVALS =

The values of all “psuedo constants” defined in this module

[P1, m2, M2, m3, M3, P4, TT, P5, m6, M6, m7, M7, P8].freeze

INTERVAL_NAMES =

The names of all “psuedo constants” defined in this module

MTK::Core::Interval::NAMES

Instance Attribute Summary

• #M2 ⇒ MTK::Core::Interval[2] readonly

  major second.

• #m2 ⇒ MTK::Core::Interval[1] readonly

  Number of semitones in the interval m2.

• #M3 ⇒ MTK::Core::Interval[4] readonly

  major third.

• #m3 ⇒ MTK::Core::Interval[3] readonly

  minor third.

• #M6 ⇒ MTK::Core::Interval[9] readonly

  major sixth.

• #m6 ⇒ MTK::Core::Interval[8] readonly

  minor sixth.

• #m7 ⇒ MTK::Core::Interval[10] readonly

  minor seventh.

• #M7 ⇒ MTK::Core::Interval[11] readonly

  major seventh.

• #P1 ⇒ MTK::Core::Interval[0] readonly

  Number of semitones in the interval P1.

• #P4 ⇒ MTK::Core::Interval[5] readonly

  pefect fourth.

• #P5 ⇒ MTK::Core::Interval[7] readonly

  perfect fifth.

• #P8 ⇒ MTK::Core::Interval[12] readonly

  pefect octave.

• #TT ⇒ MTK::Core::Interval[6] readonly

  tritone (AKA augmented fourth or diminished fifth).

Method Summary

Methods included from PseudoConstants

define_constant

Instance Attribute Details

#M2 ⇒ MTK::Core::Interval[2] (readonly)

major second

Returns:

• (MTK::Core::Interval[2]) —

  number of semitones in the interval M2

# File 'lib/mtk/lang/intervals.rb', line 33

define_constant 'M2', MTK::Core::Interval[2]

#m2 ⇒ MTK::Core::Interval[1] (readonly)

Returns number of semitones in the interval m2.

Returns:

• (MTK::Core::Interval[1]) —

  number of semitones in the interval m2

# File 'lib/mtk/lang/intervals.rb', line 30

define_constant 'm2', MTK::Core::Interval[1]

#M3 ⇒ MTK::Core::Interval[4] (readonly)

major third

Returns:

• (MTK::Core::Interval[4]) —

  number of semitones in the interval M3

# File 'lib/mtk/lang/intervals.rb', line 39

define_constant 'M3', MTK::Core::Interval[4]

#m3 ⇒ MTK::Core::Interval[3] (readonly)

minor third

Returns:

• (MTK::Core::Interval[3]) —

  number of semitones in the interval m3

# File 'lib/mtk/lang/intervals.rb', line 36

define_constant 'm3', MTK::Core::Interval[3]

#M6 ⇒ MTK::Core::Interval[9] (readonly)

major sixth

Returns:

• (MTK::Core::Interval[9]) —

  number of semitones in the interval M6

# File 'lib/mtk/lang/intervals.rb', line 54

define_constant 'M6', MTK::Core::Interval[9]

#m6 ⇒ MTK::Core::Interval[8] (readonly)

minor sixth

Returns:

• (MTK::Core::Interval[8]) —

  number of semitones in the interval m6

# File 'lib/mtk/lang/intervals.rb', line 51

define_constant 'm6', MTK::Core::Interval[8]

#m7 ⇒ MTK::Core::Interval[10] (readonly)

minor seventh

Returns:

• (MTK::Core::Interval[10]) —

  number of semitones in the interval m7

# File 'lib/mtk/lang/intervals.rb', line 57

define_constant 'm7', MTK::Core::Interval[10]

#M7 ⇒ MTK::Core::Interval[11] (readonly)

major seventh

Returns:

• (MTK::Core::Interval[11]) —

  number of semitones in the interval M7

# File 'lib/mtk/lang/intervals.rb', line 60

define_constant 'M7', MTK::Core::Interval[11]

#P1 ⇒ MTK::Core::Interval[0] (readonly)

Returns number of semitones in the interval P1.

Returns:

• (MTK::Core::Interval[0]) —

  number of semitones in the interval P1

# File 'lib/mtk/lang/intervals.rb', line 24

define_constant 'P1', MTK::Core::Interval[0]

#P4 ⇒ MTK::Core::Interval[5] (readonly)

pefect fourth

Returns:

• (MTK::Core::Interval[5]) —

  number of semitones in the interval P4

# File 'lib/mtk/lang/intervals.rb', line 42

define_constant 'P4', MTK::Core::Interval[5]

#P5 ⇒ MTK::Core::Interval[7] (readonly)

perfect fifth

Returns:

• (MTK::Core::Interval[7]) —

  number of semitones in the interval P5

# File 'lib/mtk/lang/intervals.rb', line 48

define_constant 'P5', MTK::Core::Interval[7]

#P8 ⇒ MTK::Core::Interval[12] (readonly)

pefect octave

Returns:

• (MTK::Core::Interval[12]) —

  number of semitones in the interval P8

# File 'lib/mtk/lang/intervals.rb', line 63

define_constant 'P8', MTK::Core::Interval[12]

#TT ⇒ MTK::Core::Interval[6] (readonly)

tritone (AKA augmented fourth or diminished fifth)

Returns:

• (MTK::Core::Interval[6]) —

  number of semitones in the interval TT

# File 'lib/mtk/lang/intervals.rb', line 45

define_constant 'TT', MTK::Core::Interval[6]