Simple Surround Sound Decoder


Posted on Sep 21, 2012

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 1, for use as the rear speakers in the surround setup. This is ok just as it stands, but problems are created if the main speakers are bi-amped or using bridging, for example, since there is no longer a full-range / full power signal available for the rear speakers. There is also no way to control the level reproduced, since it will always simply be the difference signal between left and right channels. If the signal is mono, then the signal in both channels will always be more or less identical, and there will be no output from the rear speakers at all.


Simple Surround Sound Decoder
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