Even the best surround technology doesn't take into account one very important factor affecting the sound you hear. That's the fact that your cozy living room has nothing in common, acoustically speaking, with cavernous theaters and concert halls, or any other locations where real movie or musical performances take place. Yamaha's musical heritage includes extensive research into the way sound behaves in venues such as these. And we've developed some very sophisticated techniques for reproducing that behavior in your home, using proprietary microchips designed and fabricated in our own facilities. We call this DSP. And it's short for Digital Sound Field Processing. It can make a few home speakers reproduce the seamless curtain of sound created by multiple-speaker arrays in your local theater. It can recreate the ambiance of a stadium, a concert hall or an intimate club. And when combined with Dolby Digital and Dolby Surround Pro Logic, it can even expand the apparent dimensions of your room--letting you experience the spaciousness of a large theater, while hearing every sound coming from exactly where the director intended. Tri-Field Processing: A unique combination of Dolby Digital and Digital Sound Field Processing. Dolby Digital technology has changed the way we listen to movie sound tracks. It debuted in movie theaters in 1992 with the release of Batman Returns and has found its way into many homes since then. Dolby Digital offers several features that separate it from Dolby Pro-Logic:
- Full frequency response in all channels (3 Hz - 20kHz)
- Independent, discrete surround channels
- A separate track for bass only, called a Low Frequency Effects channel.
- Preserve the localization and directionality of the sound track as it was created by the movie sound designer,
- Increase the acoustic size of a home theater to the size of a movie theater.