Class: Juicy::Duration

Inherits:
Object
  • Object
show all
Defined in:
lib/juicy/duration.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(duration) ⇒ Duration

Returns a new instance of Duration.



5
6
7
8
 
# File 'lib/juicy/duration.rb', line 5

def initialize(duration)
  @duration = parse_duration(duration)
  
end

Class Method Details

.duration_of_quarter_note_in_milliseconds(tempo) ⇒ Object 



10
11
12
 
# File 'lib/juicy/duration.rb', line 10

def self.duration_of_quarter_note_in_milliseconds(tempo)
  60_000.0/tempo
end

Instance Method Details

#duration_in_milliseconds(tempo) ⇒ Object 



14
15
16
17
18
19
20
 
# File 'lib/juicy/duration.rb', line 14

def duration_in_milliseconds(tempo)
  # how long a note is depends on the tempo and the musical duration
  # e.g. at 120 bpm, and a duration of an eighth note, the duration
  # in milliseconds would be 60_000.0/120/2
  # milliseconds_per_second*seconds_per_minute/bpm/beats_of_given_type_per_quarter_note
  60_000.0/tempo*beats_of_given_type_per_quarter_note
end

#to_s ⇒ Object 



22
23
24
 
# File 'lib/juicy/duration.rb', line 22

def to_s
  @duration.to_s
end