HISTORY The first commercially successful multichannel sound formats were developed in the early 1950s for the cinema. Optional stereo surround than two channels. As home stereo grew in popularity, equipment manufacturers began 70 mm magnetic:
As home stereo grew in popularity, equipment manufacturers began to look for ways to expand their market. This was one motivation behind the ill-fated four-channel, or quadraphonic (“quad”), home stereo In the mid-1970s, Dolby Laboratories introduced a new sound technology for 35 mm prints originally called Dolby Stereo. Instead of being based on magnetic striping, it used the photographic, or optical, soundtrack technology used to put mono sound on film since the 1930s.stereo was coming of age, and personal headphone portables were providing a new way to listen to music. A generation had grown up Unlike quad, Dolby Surround gained, and continues to gain, considerable marketplace acceptance. For one thing, the channel configuration In the late 1980s, Dolby Laboratories undertook the application of digital audio technology to 35 mm film sound in response to growing interest from the film industry. (5.1 ch.); (5.1 ch.) DTV Dolby ch.) in U.S. ch.)
Today Dolby Surround has gone on to include TV broadcasting—not only films with Dolby encoded soundtracks, but also regular series, specials and sports events. And although Dolby Surround was The 5.1 configuration features five discrete full-range channels—left, center, right, left surround, and right surround—plus a sixth channel for those powerful low-frequency effects (LFE) that are felt more than heard in cinemas. As it needs only about onetenth the bandwidth of the others, the LFE channel is referred to as a “.1” channel.