JOCLoudness
The JOCLoudnessRuby is a native ruby code able to load a wav file and calculate its Loudness in LKFS following the ITU-R BS.1770
Accepted formats (.WAV):
Headers of 16, 18, 40 bytes
Any sampling frequency
Any number of channels
PCM 8,16,24 bits per sample or FLOAT 32 bits per sample
Note 1: This module recalculates automatically the filter coefficients depending on input file sampling frequency
Note 2: ITU-R BS.1770 is a NOT gated measure
Usage examples:
- Simple:
require 'JOCLoudness'
wavfilename = "c:\\Test.wav"
begin
loud = JOCLoudness.new(wavfilename)
lkfs = loud.CalcLoudness()
loud.Close()
puts "Loudness of #{wavfilename} = #{lkfs.round(1)} LKFS"
rescue Exception => e
puts "Error: #{e.}, Trace: #{e.backtrace.inspect}"
end
- Advanced:
require 'JOCLoudness'
wavfilename = ARGV[0]
logfilename = ARGV[1]
begin
loud = JOCLoudness.new(wavfilename, logfilename, Logger::DEBUG)
lkfs = loud.CalcLoudness()
loud.Close()
puts "Loudness of #{wavfilename} = #{lkfs.round(1)} LKFS"
rescue Exception => e
puts "Error: #{e.}, Trace: #{e.backtrace.inspect}"
end
You can download test files from https://tech.ebu.ch/loudness (See test material)
If you want more information about loudness you can go to http://www.jordicenzano.name/projects/loudness
To contact me: [email protected]