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Today, Dolby Stereo is the analog sound standard, thanks to its superior sound quality and relatively simple installation. But instead of using magnetic tracks, it reverted back to the superior optical track technology to allow for clearer sound playback. Several different theater setups emerged in this era, including the famous Cinerama and Cinemascope, but most of them used the same basic sound technology. Today, what is control cable theater audiences expect to hear sound coming from every direction; and the technology that once characterized only movie theaters is now fairly standard in home entertainment centers. The heightened sound quality of Dolby Stereo led moviemakers to make more extensive use of the surround channel. The real innovation of Dolby Stereo is how so much audio information is squeezed into a small space on the film. If you'd like more information about iPhone car apps or other automotive electronics, follow the links on the next page. In addition to separating the different signals, proper surround decoders pass the audio information through different filters and noise-reduction elements to balance sound levels and reduce noise. When an actor speaks on the left side of the screen, the dialogue sound comes from the left speakers. When an actor speaks on the right side, the sound comes from the right speakers.

Magnetic tracks could not produce as clear a sound as the conventional optical audio tracks, and they tended to fade over time, but they took up a lot less space on the film. Disney sound engineer William Garity took separate recordings of each orchestra section and mixed them to produce four distinct audio tracks, which were recorded as optical tracks on a separate reel of film. To understand how this works, you need to know a little bit about how speakers produce sound. While the term "surround sound" technically refers to specific multi-channel systems designed by Dolby Laboratories, it is more commonly used as a generic term for theater and home theater multi-channel sound systems. Panning involves fading a sound (a violin melody, for example) from one audio channel while building it on another. In an equipped theater, the music seemed to move around the auditorium, an effect achieved by sound panning. Mono means that all the sound is recorded onto one audio track or channel (a single spiraled groove in a record, for example, or a single magnetic track on tape), which is typically played on one speaker.

The A stream feeds the left speaker, and the B stream feeds the right speaker. With the right tools and knowledge, you can minimize your chances of having your security compromised by malicious hackers or computer viruses. Sounds like quite the formula for happiness, right? Probably not. Professionals, like members of famous performing Ayala family, are some of only a dozen hair-hanging families worldwide. Newer engine computer systems also feature lightweight, low-cost memory systems that can be easily accessed by the dealership to fix programming issues and update specifications (kind of like running a system or software update on your computer). In order to allow for four separate audio channels, they developed a special 4-2-4 processing system. The MAME software emulates that hardware, including the arcade machine's memory, processors or central processing unit (CPU) and input/output (I/O) spaces. In 1987, Dolby introduced Dolby Pro Logic®, which had an additional channel for a front central speaker. Typically, the operator will walk ahead of the actors, shooting them from the front as they walk and talk. Of course, HowStuffWorks doesn't encourage speeding or reckless behavior, but anyone curious about the performance of their vehicle will surely get a kick out of putting your skills to the test -- even if it is in the family's minivan.

Herrman, John. "iPhone Apps We Like: Dynolicious Car Performance Meter." Gizmodo. Holding down the set/accel button will make the car accelerate; and on this car, tapping it once will make the car go 1 mph faster. There are many ways to make and present a sound recording. In the next section, we'll see what made this system the new standard for theater sound. The popular four-channel system included one channel driving a speaker on the left, one channel driving a speaker on the right, one channel driving a center speaker and one channel driving surround speakers along the sides and back of the theater. In this article, we'll take a look at the surround-sound systems that have become standard movie theater equipment. We'll also look at home-theater surround-sound setups and get you started building your own. Once the client arrives, it's the responsibility of the recording engineer and his assistants to help the client get all of its equipment set up in the studio and prepared for recording.