Yamaha YSP-2700 Owners Manual - Page 106

Basic knowledge of surround sound What is Surround Sound? Surround sound offers the sense of being surrounded by sounds, an experience common in concert halls and movie theaters. This can be achieved by surrounding the audience with numerous speakers from which sound is output uniformly in all directions. This "surround sound" technology immerses the listener in sound with speakers positioned not only in front of the listener, but also behind and to the sides of the listener, making him or her feel as if they are actually in the situation. For precise directional control and quality of sound reproduction, sounds must be split into separate audio channels for output to each speaker. Surround sound systems for regular home use (7.1-channel speaker systems) produce surround sound using seven speakers and a subwoofer, as shown below: Typical 7.1 channel speaker system Front speakers Subwoofer Center speaker Surround back speakers Surround speakers 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. What is a Digital Sound Projector? 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). Digital amplifier Speaker Sound beams are emitted in the target direction These focused sounds possess wave-like characteristics. When they hit a hard wall, they are reflected off the wall. A digital sound projector outputs sound beams from five channels, including front (left/right), center, and surround (left/right) channels, by reflecting these beams off the walls 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. 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 channels. 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. The sound image of the system Yamaha's audio technologies This unit features many more functions based on Yamaha's superior audio technologies. Compressed Music Enhancer This technology enhances and extends bass and treble, which tend to be weak in digitally compressed formats such as MP3 used with portable digital audio players and computers. This makes compressed audio sound more musically dynamic. CINEMA DSP This technology enables precise digital recreation of actual acoustic environments found in well-known concert halls and movie theaters. This is achieved using Yamaha's exclusive sound field programs, which are based on data measured in various sound fields, and with which the amplitude, depth, and volume of sounds have been adjusted. APPENDIX ➤ Basic knowledge of surround sound En 106