Playback

Praat for Beginners:
Tutorial: Playback

  1. Sound objects and LongSound objects
  2. Sound sources
  3. Playback from the Sound recorders
  4. Playback from the Objects window
  5. Playback from the Sound editor

Top

1. Sound objects and LongSound objects

  • Playback procedure is different for Sound objects and LongSound objects in Praat. Make sure you know the difference.
  • Sound objects are loaded completely, and you can do more with them. LongSound objects are too large to load completely. They are loaded a little at a time, as you choose, and you can do less with them. For more details see LhereL.

Top

2. Sound sources

  • Check that necessary sound devices are connected and switched on.
  • Check that the sound source is set in the Windows volume control:
  • Wave is for sound files, Praat Sound objects, and AudioCD in the computer’s CD or DVD drive.
  • Microphone is your sound system’s microphone input.
  • Line-in is your sound system’s line input.
  • It’s good practice to mute unused sources.
  • See the Windows volume control for more details.

Top

3. Playback from the Sound recorders

  • Clicking the Play button plays a new recording, so long as it’s still available (i.e. still held in the Sound buffer).
  • Playback from the Sound recorders cannot be interrupted (the [Esc] or [Tab] keys are not active there).
  • The default Sound buffer size (20MB) is large enough for a new recording to be a Praat LongSound. That doesn’t affect playback (the recording is safe so long as it’s in the buffer).
  • For more details see Sound recorder playback.

Top

4. Playback from the Objects window

  • Sound objects and LongSound objects are handled differently.
  • Select a Sound object and click Play.
    • The [Esc] key is active and stops playback.
    • The [Tab] key is not active, and does not toggle playback on/off.
  • Select a LongSound object and click Play part. Then set the start and end times of what you want to hear. Repeat the procedure to listen again.
    • The [Esc] key is active and stops playback.
    • The [Tab] key is not active, and does not toggle playback on/off.

Top

5. Playback from the Sound editor

  • There’s no difference between Sound objects and LongSound objects in the Sound editor with regard to playback, although they are handled differently in other respects.
  • The next two pictures show, respectively, a Sound object and a LongSound object in the Sound editor. The relevant details are marked A-H on both
  • Both are zoomed to a previous selection, and there’s a new selection (A) in the visible part, dividing it into three. Letters B-H indicate where a mouse click will play different parts of the sound signal.
    • B plays what you see before the selection A.
    • C plays the selection A.
    • D plays what you see after the selection A.
    • E plays the whole visible part.
    • F (left) plays the hidden part before what you see.
    • G (right) plays the hidden part after what you see.
    • H plays the entire sound signal, hidden and visible parts.
  • The [Esc] key stops playback completely.
  • The [Tab] key toggles stop/continue as often as you wish during playback.
Top
©Sidney Wood and SWPhonetics, 1994-2012