You will also need a sound card and computer speakers. Open your sound-editing software. If you are using Windows Sound Recorder, open it from the Start menu. Click Open from the File menu, and then locate the file you want to edit. The file opens.
Sound files contain a series of vertical lines of various lengths.
Move the slider to the place that you want to begin or end the cut to delete part of a sound file using Sound Recorder. From the Edit menu, click Delete Before Slider or Delete After Slider. Go to the Effects menu to change the speed of the sound file, and select Increase Speed or Decrease Speed. Select Increase Volume or Decrease Volume from the Effects menu to change the volume. Click Reverse in the Effects menu to reverse a sound file.