Dolby Pro Logic

1990s saw the birth of Dolby Pro Logic, which is the successor of Dolby surround. If you are using a Dolby pro-logic soundtrack it means that four channels of audio information is first matrix encoded onto two audio tracks. They are then carried on stereo program sources, where they are decoded by Dolby Pro Logic to recreate the original four channel surround sound experience. The four channels of audio information in Dolby Pro Logic are referred to as Left, Right, Center, and Mono surround.

Dolby Pro Logic surround sound audio tracks can be found in millions of videocassettes, laser discs, DVDs, and television programs. It was in fact the foundation of multi-channel home theater. It is basically an analog system that uses five speakers to reproduce the four channels.

Dolby Prologic II was a vast improvement over Dolby Pro Logic. It processes high quality stereo audio tracks into five channels of full bandwidth surround sound. It is used in home theater systems, computers, game consoles, and multi-channel audio car systems. What you get with Dolby Pro Logic II decoder is sound that is high on fidelity. Play your old CDs using Dolby Prologic II and see the difference.

The great part about Dolby technologies is that all its sound formats are backward compatible. What it simply means is that your Dolby Prologic II is fully compatible with Dolby surround Pro Logic decoder. The latest Dolby Digital is fully compatible with Dolby Pro Logic and Dolby Prologic II. Therefore, if you are debating about Dolby Prologic vs. Dolby Digital, you should stop. The latest home theaters, DVD players, etc are obviously going to carry the latest Dolby technology- Dolby Digital; however, you can still enjoy Dolby Prologic on Dolby Digital.

Whether you are using Dolby Prologic or Dolby Digital, you need proper speaker set up to get the best home theater surround sound. If you are using Dolby Pro Logic, it means that your system is using six channels-five full range channels and one low-frequency effects channel. You should try your best to have the front speakers, high frequency drivers or tweeters positioned at ear level of your sitting position. Try different places for your subwoofers to get the best bass effect.

Another key to getting the best surround sound is getting a good brand home theater or music system. If you are buying in-built Aiwa NSX Dolby pro logic, make sure you test how the speakers perform. If your budget permits, you can opt for a component home theater system and buy the best components for your home theater system. Final word is that if your system has Dolby technology, it will give you good surround sound effect.