Equalize Amplitude

This script takes all the files in the specified directory, modify their amplitude (dB), and writes new files to a new folder. It takes three arguments: InputDir is the input folder; positive dB is a dB value to which you want your files to be modified.

Codes

• Let the script know the input directory and set the wanted amplitude value

  form Files
    sentence InputDir  /Users/haerimhwang/Desktop/Done/
    positive dB 65
  endform
  

• Create an output folder (named “output”)

  createDirectory ("/Users/haerimhwang/Desktop/Done/output/")
  

• What Praat does for looping is first to create a string list and counts how many files there are in that list (find n)
  
  

• This allows us to do operation X for n-times

  Create Strings as file list... list 'inputDir$'*.wav
  numberOfFiles = Get number of strings
  

• “for” is a function for loop.
  
  

• “ifile” means as follows:
  
  

• Start i with 1 and do the operation that follows: change i to 2 and do the operation, change i to 3…., keep until i becomes n
  
  

• Open i-th file in the string list
  
  

• Write the output file (see your script folder)

  for ifile to numberOfFiles
    select Strings list
    fileName$ = Get string... ifile
    Read from file... 'inputDir$''fileName$'
          
    Scale intensity... 'dB' # THIS IS WHERE YOU SPECIFY THE OPERATION YOU WANT PRAAT TO DO
          
    Write to WAV file... 'fileName$'
          
    select all # cleaning
    minus Strings list 
    Remove # remove everything from the object window	
          
  endfor
  select all
  Remove