Yamaha YHT-S400 AYHTS400BL Manual Do Utilizador

■ AIR SURROUND XTREME

This system employs new technologies and algorithms 
that make it possible to achieve 7-channel surround 
sound with only front speakers, and without using wall 
reflections.

Ordinarily, two front speakers, a center speaker, two 
surround speakers, and a subwoofer are necessary for 
enjoying 5.1 channel surround sound.

The AIR SURROUND XTREME technology, using 
only front speakers and subwoofer, enables you to 
enjoy a realistic 7.1 channel sound by simulating 
sound from virtual speakers at center, surround, and 
surround backs.

■ Channel (ch)

A channel is an audio type that has been divided based 
on range and other characteristics. 
Ex. 7.1 channel
• Front speakers, Left (1ch), Right (1ch)
• Center speaker (1ch)
• Surround speakers, Left (1ch), Right (1ch)
• Surround back speakers, Left (1ch), Right (1ch)
• Subwoofer (1ch × 0.1

*

 = 0.1ch)

* In contrast to a full 1-channel band, a component 

designed to enhance low frequency sound for added 
effect.

■ Deep Color

Deep Color refers to the use of various color depths in 
displays, up from the 24-bit depths in previous 
versions of the HDMI specification. This extra bit 
depth allows HDTVs and other displays go from 
millions of colors to billions of colors and eliminate 
on-screen color banding for smooth tonal transitions 
and subtle gradations between colors. The increased 
contrast ratio can represent many times more shades of 
gray between black and white. Also Deep Color 
increases the number of available colors within the 
boundaries defined by the RGB or YCbCr color space.

■ Dolby Digital

Digital surround sound system which is developed by 
Dolby Laboratories provides completely independent 
multi-channel audio. With 3 front channels (left, 
center, and right) and 2 surround stereo channels, 
Dolby Digital provides five full-range audio channels. 
With an additional channel especially for bass effects 
(called LFE, or low frequency effect), the system has a 
total of 5.1 channels (LFE is counted as 0.1 channel). 
By using 2 channel stereo for the surround speakers, 
more accurate moving sound effects and surround 
sound environment are possible than with Dolby 
Surround.

Front speakers

Subwoofer

Center speaker

Surround speakers

The system creates the virtual 7.1 channel surround sound with the 
subwoofer integrated receiver and the speaker.
C: Center speaker
FR, FL: Front speakers
SW: Subwoofer
SR, SL: Surround virtual speakers
SBR, SBL: Surround back virtual speakers