Yamakawa DVD-208 - Manual (Page 23)

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The Audio-key lets you change the language during playback if the
movie has more than one audio track on the disc. When pressing the
key a display will show the available audio tracks of the movie. By
pressing the key several times all of the
available audio tracks will be shown on the
screen. Press the key as often as needed to
select your desired audio track. This setting will
be activated shortly after.
The angle key lets you choose between different angles of the camera.
Films that offer this special function are specially marked. By
pressing the angle-key you can see a certain
scene from the different view angles provided
by the disc. A short info on the screen tells you
how many different angles can be selected.
The mute key can activate or deactivate the sound during playback.
The equivalent info will be displayed on the screen.