Yamaha YSP-5600 Digital Sound Projector Owner's Manual

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APPENDIX
➤ Basic Knowledge of Surround Sound
En
101
What is a Digital Sound Projector?
A typical surround sound playback system uses 5 to 7 speakers. To 
configure a surround sound playback system that enables audio 
playback in the vertical direction, 2 or more additional speakers 
should also be installed above the listening position.
A highly realistic sound field can be created with multiple speakers 
installed around the listening position as shown in the illustration 
above. However, this can be difficult to do in a living room. The unit 
utilizes “digital sound projector” technology, enabling it alone to 
provide a realistic and engaging surround sound experience.
A digital sound projector provides optimal control over the delay time 
for each of the compact speakers installed in orderly rows, and 
drives the amplifier for each of these speakers, synthesizing audio 
signals output from each speaker as highly focused sounds (sound 
beams).
These focused sounds possess wave-like characteristics. When they 
hit a hard wall or ceiling, they are reflected off the wall or ceiling. A 
digital sound projector outputs sound beams from seven channels, 
including front (left/right), center, surround (left/right), and height (left/
right) channels, by reflecting these beams off the walls and ceiling so 
that sounds reach the listener from the appropriate direction. It 
features a technology that enables true surround sound without 
requiring the installation of speakers behind or to the sides of the 
listener, or in the ceiling. 
By combining sound beams coming from the front (left/right) and 
back (left/right), it can also create two new audio channels for 
surround sound playback using 7.1 channels in the horizontal 
direction. With this configuration, the new audio channels output 
sounds from surround sound channels, while sound beams coming 
from behind the listening position (left/right) output sounds from 
surround back channels.
Basic Knowledge of Surround Sound
Front speaker
Subwoofer
Surround 
speaker
Center speaker
Surround back speakers
Front speaker
Height speakers
Surround
speaker
Digital amplifier
Speaker
Sound beams are emitted 
in the target direction
The sound image of the system