Dolby Pro Logic - Hitachi 46UX20B Operating Manual

Projection color tv
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AUDIO
Listener is surrounded by many sound sources such as a sporting event, etc.
NOTE: Some TV systems do not transmit optimum audio channel separation which can
reduce the effectiveness of the MATRIX SURROUND function.
HALL SURROUND
Resonant sound - Listener has the feeling of being in a concert hall.

DOLBY PRO LOGIC

Dolby Pro Logic provides four separate sound channels: left, center, right and surround.
For a properly encoded program marked
contains the dialogue for the program viewed. The left and right channels produce
sound effect that will match the action on the TV screen. For example, Dolby Pro Logic
will enhance the effect of a car viewed driving from the left side of the TV screen to the
right side. The surround channel (speakers) are placed behind the viewing area to add
additional spatial sound effects.
To fully benefit from Dolby Pro Logic Surround, it is recommended that the surround
speaker system be complete as shown on page 15.
Use the CURSOR buttons to select the surround function.
MODE
Can be set to 3CH LOGIC or PRO LOGIC. When 3CH LOGIC is set, the surround
channel sound is split equally between the left and right speakers of a separate audio
amplifier. When PRO LOGIC is set, separate surround sound speakers must be used.
CENTER EXPANSION
This can be set to NORMAL or ULTRA BOOST. When NORMAL is set, center channel
sound is sent to the TV center speaker only. When ULTRA BOOST is set, center
channel sound is split equally between the left and right TV speakers.
TEST TONE
A test sound is generated allowing the listener to balance volume from each channel.
Adjust the volume levels until all channels are equal.
- 47 -
the center sound channel

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