Hitachi VM-E230A Instruction Manual page 38

Basic Techniques
video at double speed.
To restore normal playback, press the PLAY button on either the remote control or the
camcorder.
Note: The indication showing double speed playback does not appear.
Note: When double speed playback is activated, both the picture and sound are played
back at twice the normal speed. This will cause noise lines to appear on the picture and the
sound to become warbled. (With some tapes the width of the noise band may vary or noise
may flow.)
Note: With some TVs, the synchronization may unlock and the picture may fluctuate or the
picture may become black-and-white.