What is Dolby® Virtual Speaker?
Dolby® Virtual Speaker produces a surround sound experience over stereo speakers, creating a virtual 5.1 speaker system without the extra speakers, cost, wires or hassle. This proprietary technology processes encoded multi-channel soundtracks, rewriting and re-encoding them for output over two speakers without losing the surround sound effect. Seem impossible? Not to the creative folks at Dolby. To understand how it works, consider a simple sonic signature. A speaker is placed several feet (2-3m) in front of a subject in a typical-sized living room. A tone is emitted from the speaker. Some of the sound waves reach the left and right ears directly at slightly different intervals, but other waves bounce off walls, ceiling and flooring, reaching the ears not only at different intervals but also at slightly different levels of volume and tone. The brain calculates both direct and reflected sound to pinpoint the signal source and to gain a feel for the size of the room. By processing sounds
