gyrophone - to make your stereo wander

gyrophone elektor january 1984 Most of us have heard the stereo effect of an express train, a gale force wind, or perhaps an artificially created sound transferring from the right-hand to the left-hand speaker. It"s just as impressive when the sound returns from the left- hand to the right-hand speaker, as when, for instance, a train from the opposite direction passes by. The circuit described in this article makes it possible for both effects to happen simultaneously: creating a sound very much like that of a Lesley rotating speaker system. gyrophone... . to make your stereo wander Before we go any further, there is one thing to be borne in mind: the contents of the two stereo channels must be quite distinct from one another if the effect is to be realized. A short listening test will soon show which type of recording is suitable: listen to it and then turn one of the speakers off. If half of the sound just "dies", the recording is usable. Stereo records produced ten years or mor...