Class: HeadMusic::Rudiment::ReferencePitch

Inherits:
Base
  • Object
show all
Includes:
Named
Defined in:
lib/head_music/rudiment/reference_pitch.rb

Overview

A reference pitch has a pitch and a frequency With no arguments, it assumes that A4 = 440.0 Hz

Constant Summary collapse

DEFAULT_PITCH_NAME = 
"A4"
DEFAULT_FREQUENCY = 
440.0
DEFAULT_REFERENCE_PITCH_NAME = 
"A440"
NAMED_REFERENCE_PITCHES = 
{
    frequency: 415.0,
    key: :baroque,
    alias_keys: i[chamber_tone]
  },
  {
    frequency: 430.0,
    key: :classical,
    alias_keys: i[haydn mozart]
  },
  {
    pitch: "C4",
    frequency: 256.0,
    key: :scientific,
    alias_keys: i[philosophical sauveur]
  },
  {
    frequency: 432.0,
    tuning: "Pythagorean",
    key: :verdi
  },
  {
    frequency: 435.0,
    key: :french,
    alias_keys: i[continental international]
  },
  {
    frequency: 439.0,
    key: :new_philharmonic,
    alias_keys: i[low]
  },
  {
    frequency: 440.0,
    key: :a440,
    alias_keys: i[concert stuttgart scheibler iso_16]
  },
  {
    frequency: 441.0,
    key: :sydney_symphony_orchestra
  },
  {
    frequency: 442.0,
    key: :new_york_philharmonic
  },
  {
    frequency: 443.0,
    key: :berlin_philharmonic
  },
  {
    frequency: 444.0,
    key: :boston_symphony_orchestra
  },
  {
    frequency: 452.4,
    key: :old_philharmonic,
    alias_keys: i[high]
  },
  {
    frequency: 466.0,
    key: :chorton,
    alias_keys: i[choir]
  }
].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name = DEFAULT_REFERENCE_PITCH_NAME) ⇒ ReferencePitch 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 85

def initialize(name = DEFAULT_REFERENCE_PITCH_NAME)
  record = named_reference_pitch_record_for_name(name)
  @pitch = HeadMusic::Rudiment::Pitch.get(record.fetch(:pitch, DEFAULT_PITCH_NAME))
  @frequency = record.fetch(:frequency, DEFAULT_FREQUENCY)
  initialize_keys_from_record(record)
end

Instance Attribute Details

#alias_name_keys ⇒ Object (readonly) Originally defined in module Named

Returns the value of attribute alias_name_keys.

#frequency ⇒ Object (readonly)

Returns the value of attribute frequency.



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 78

def frequency
  @frequency
end

#name_key ⇒ Object (readonly) Originally defined in module Named

Returns the value of attribute name_key.

#pitch ⇒ Object (readonly)

Returns the value of attribute pitch.



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 78

def pitch
  @pitch
end

Class Method Details

.get(name) ⇒ Object 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 80

def self.get(name)
  return name if name.is_a?(self)
  get_by_name(name)
end

Instance Method Details

#description ⇒ Object 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 92

def description
  [
    pitch.letter_name,
    format(
      "%<with_digits>g",
      with_digits: format("%.2<frequency>f", frequency: frequency)
    )
  ].join("=")
end

#ensure_localized_name(name:, locale_code: Locale::DEFAULT_CODE, abbreviation: nil) ⇒ Object Originally defined in module Named

#initialize_keys_from_record(record) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 128

def initialize_keys_from_record(record)
  @key = record[:key]
  @alias_keys = [record[:alias_keys]].flatten.compact
end

#localized_name(locale_code: Locale::DEFAULT_CODE) ⇒ Object Originally defined in module Named

#localized_name_in_default_locale ⇒ Object (private) Originally defined in module Named

#localized_name_in_locale_matching_language(locale) ⇒ Object (private) Originally defined in module Named

#localized_name_in_matching_locale(locale) ⇒ Object (private) Originally defined in module Named

#localized_names ⇒ Object Originally defined in module Named

Returns an array of LocalizedName instances that are synonymous with the name.

#name(locale_code: Locale::DEFAULT_CODE) ⇒ Object Originally defined in module Named

#name=(name) ⇒ Object Originally defined in module Named

#name_and_alias_translations_for_keys(name_keys) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 139

def name_and_alias_translations_for_keys(name_keys)
  name_keys.map do |name_key|
    I18n.config.available_locales.map do |locale_code|
      I18n.translate(name_key, scope: i[head_music reference_pitches], locale: locale_code)
    end.flatten.uniq.compact
  end.flatten.uniq.compact
end

#name_keys_from_record(record) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 115

def name_keys_from_record(record)
  names_from_record(record).map { |name| HeadMusic::Utilities::HashKey.for(name) }
end

#named_reference_pitch_record_for_name(name) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 108

def named_reference_pitch_record_for_name(name)
  key = HeadMusic::Utilities::HashKey.for(normalized_name_string(name))
  NAMED_REFERENCE_PITCHES.detect do |record|
    name_keys_from_record(record).include?(key)
  end || named_reference_pitch_record_for_name(DEFAULT_REFERENCE_PITCH_NAME)
end

#names_from_record(record) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 119

def names_from_record(record)
  name_keys = ([record[:key]] + [record[:alias_keys]]).flatten.compact.uniq
  normalized_translations_for_keys(name_keys)
end

#normalized_name_string(name) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 124

def normalized_name_string(name)
  name.gsub(" pitch", "").gsub(" tone", "").gsub(" tuning", "")
end

#normalized_translations_for_keys(name_keys) ⇒ Object (private) 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 133

def normalized_translations_for_keys(name_keys)
  name_and_alias_translations_for_keys(name_keys).map do |name|
    normalized_name_string(name)
  end
end

#to_s ⇒ Object 



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# File 'lib/head_music/rudiment/reference_pitch.rb', line 102

def to_s
  description
end