Praat for Beginners
Extracting channels from a stereo Sound object
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.
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:
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: