Yamaha Natural Sound AV-75PRO Owner's Manual page 10

NATURAL SURROUND
Tne Natural Surround is an exclusive YAMAHA surround-sound processing
mode which is effective with all music and audio sources of video sound.
It creates a natural, lifelike surround-sound effect without the use of delay
circuitry, adding considerable depth and imaging to all audio sources. It is
recommended for both music listening and for viewing stereo video
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sources.
Note |
If a monaural sound source is used in the Dolby Pro Logic or Natural
Surround mode, no sound will be heard from the rear. speakers.
INPUT BALANCE CONTROL ADJUSTMENT
To obtain the best surround-sound condition, be sure to adjust the INPUT `
BAL control.
1. Disconnect the speaker wires from the front speakers (so that the
sound from the front speakers will not be heard).
2. Set the front panel controls as follows.
е Set the CENTER MODE selector to the "OFF" position.
е SURROUND MODE ON/OFF switch - Set to ON.
e SURROUND MODE selector ~ Set to the ПП PRO position.
@ REAR level control — Set to the "10" (maximum) position.
3. Set the INPUT BAL control to the center position:
4. Play the monaural portion (such as dialogue) of a program source
encorded with Dolby surround-sound.
5. Increase the VOLUME control setting so that you can hear the `
monaural program source through the rear speakers. |
6. Then minimize the rear speakers' output by slightly turning the INPUT
BAL control clockwise or counterclockwise until you achieve a "null" (е.,
minimum output from your rear speakers).
. NOTE: As you approach the "null", increase the VOLUME control
setting to better hear your rear speakers.
With this adjustment, the best surround-sound balance can be obtained.
FRONT/CENTER/REAR SPEAKER BALANCE ADJUSTMENT
Using the built-in test tone generator, this procedure lets you adjust the
volume balance between the front, center, and rear speakers. This
adjustment is important for proper Dolby Pro Logic Surround-sound
operation.
1. Set the SURROUND MODE ON/OFF switch to ON.
2. Set the SURROUND MODE selector to the "ОП PRO" position.
3. Set the CENTER MODE selector to the NORM position.
4, Turn on the TEST tone switch.
5 ‚ Turn up the VOLUME
control. You will hear a test tone (pink noise)
from the right front speaker, then the center speaker, then the left fron
speaker, then the rear speakers, for about two seconds each.
6. Adjust the REAR level and CENTER level controls so that the volume
heard at the listening position is the same from each speaker.
® If not using a center speaker, be sure to set the front panel CENTER
MODE selector to the PHANTOM position. You will then hear the cente
channel test tone from the left and right front speakers.
After completing this adjustment, turn off the front panel TEST switch.
OPERATION
1. Set the SURROUND MODE ON/OFF switch to ON.
2. Select the surround mode with the SURROUND MODE selector.
3. Play the program source. | |
4. Use the VOLUME control to adjust the whole sound level.