Extract channels

Praat for Beginners
Extracting channels from a stereo Sound object

  1. Mono from stereo Sound objects
  2. Extract either channel
  3. Extract both channels

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1. Mono from stereo Sound objects

  • Praat handles stereo Sound objects as stereo, e.g. by opening, saving, playing, viewing and editing both channels together.
  • But for analyses, Praat only works with mono Sound objects. Two stereo channels are quietly and temporarily combined into one mono for the computation, without altering the original Sound object.
  • Alternatively you can combine two stereo channels yourself, see Convert to mono.
  • Praat alsolets you extract either or both channels, so that they can be viewed, edited, analysed, and saved individually as separate mono Sound objects.
    • This is useful if one channel contains a better recording than the other.
    • This is necessary if the channels contain synchronized, but different, data types, e.g. speech and a physiological record, that can’t be combined and averaged.

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2. Extract either channel from a stereo Sound object

  • In the Objects window, select your stereo Sound object in the Objects list.
  • Click the Convert button in the actions list, in the Convert menu select Extract one channel
  • The Extract channel dialog opens. Enter the channel you wish to extract
    (1 for left, 2 for right):
  • Praat places a new Sound object in the Objects list, adding the channel number to the original name:
 
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Invisible line

Extracting both channels from a stereo Sound object

  • Select your stereo Sound object in the Objects window.
  • Click the convert button in the actions list, in the Convert menu select Extract all channels:
  • Praat places two new Sound objects in the Objects list, adding the channel numbers to the original file name:
 
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©Sidney Wood and SWPhonetics, 1994-2012
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