This surround-sound decoder is based on the Hafler principle, first discovered by David Hafler sometime in the early 1970s. The original idea was to connect a pair of speakers as shown in Figure, for use as the rear speakers in the surround setup.
http://sound.westhost.com/project18.htm
Many owners of satellite receivers, Nicam Stereo equipment and stereo video recorders are taking advantage of the vast improvement in realism that can be obtained on stereo film soundtracks, by feeding the sound through the Hi-Fi, and positioning the TV centrally between the speakers.
http://www.web-ee.com/Electronic-Projects/projects/surround1/index.shtml
Like many owners of stereo satellite receivers or NICAM stereo equipment, I have connected the audio output to my hi-fi system. This gives a vast improvement in realism, particularly with films.
http://www.web-ee.com/Electronic-Projects/projects/surround2/index.shtml
Like many owners of stereo satellite receivers or NICAM stereo equipment, I have connected the audio output to my hi-fi system. This gives a vast improvement in realism, particularly with films. However, by comparison to the cinema, there is still something missing! One thing that really makes a visit to the cinema memorable is the Dolby Stereo surround sound system.
http://www.web-ee.com/Electronic-Projects/projects/surround2/index.htm
There are some excellent Dolby licensed decoders available for home use, however these tend to be rather expensive. The unit presented here is a "sound-alike" circuit which, whilst not preforming as well as the real thing, still gives superb results for a more affordable price. The only other requirements are a small amplifier and a pair of cheap speakers.
http://www.web-ee.com/Electronic-Projects/projects/surround1/index.htm