B)beam travel length, C)focal length – Yamaha DIGITAL SOUND PROJECTOR HTY-750 User Manual

Page 62

MANUAL SETUP

BEAM TRAVEL LENGTH (Beam travel length)
A certain amount of delay must be applied to the sound
from each channel so that all sounds can arrive at the
listening position at the same time. This menu sets the
distance that sound beams travel after being output and
reflected off the wall until they arrive at the listening
position and adjusts the delay applied to the respective
channel.
The lines in the illustration below indicate the distance.

Choices: 0.3 m to 24.0 m (1.0 ft to 80.0 ft)
• Front L adjusts the distance the front left channel

sound beams travel.

• Front R adjusts the distance the front right channel

sound beams travel.

• Center adjusts the distance the center channel sound

beams travel.

• Surround L adjusts the distance the surround left

channel sound beams travel.

• Surround R adjusts the distance the surround right

channel sound beams travel.

We recommend that you use the setting optimized by AUTO
SETUP (see page 31). Adjust this parameter only when you
changed HORIZONTAL ANGLE (see page 59).

FOCAL LENGTH (Focal length)
Use to set the distance from the front of this unit to the
focal point of output for each channel to achieve an
expansive feeling for each channel.
The focal points except for the center channel should be
set near the reflection points on the walls. The shorter the
distance, the larger the expansion.

Choices: –1.0 m to +13.0 m (–3.5 ft to +43.5 ft)
Adjust toward – (minus) to move the focus outward and
adjust toward + (plus) to move the focus toward the
normal position.
• Front L adjusts the focal length for the front left sound

beams.

• Front R adjusts the focal length for the front right

sound beams.

• Center adjusts the focal length for the center sound

beams. Initial setting: –0.3 m (–1.0 ft)

• Surround L adjusts the focal length for the surround

left sound beams.

• Surround R adjusts the focal length for the surround

right sound beams.

We recommend that you use the initial setting (–0.3 m
(or –1.0 ft)) for the center channel.

5 beam

Front L

;;;;;;;6.0m

Front R

;;;;;;;6.0m

Center

;;;;;;;;2.5m

Surround L

;;;;9.1m

Surround R

;;;;9.1m

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b)BEAM TRAVEL LENGTH

focal length

focal point

sweet spot

Front left channel

Center channel