analogue reverberation unit

Until comparatively recently the only audio delay units that were within the budget of most home constructors were of the spring line type, which suffer from a number of disadvantages such as fixed delay time, uneven and limited frequency response, and susceptibility to mechanical vibration. Recently, however, completely electronic delays have become a feasible proposition, with the result that high-quality reverberation and other audio effects are now within economic reach of the amateur. A design for a digital reverberation unit has already been published in Elektor. The circuit published here represents an alternative approach using analogue techniques.