A digital audio mixer having 8-channel inputs and 2-channel outputs has been developed as a part of the digital audio system for professional use. As for the reverberation signal, this digital audio mixer has 4-channel AUX outputs. For musical sound mixing in the field of professional audio, a number of different reverberators have been developed such as a spring, metal-plate, magnetic tape and head. These equipments, however, do not seem to meet completely the requirements of the present recording industry. We have established a new technology for sound composition in this area and have developed an equipment which makes it possible for us to realize effective sound through digital technique. Yet the reverberators may not be neglected particularly the specific sound effect highly effective for some kinds of music. The equipment that we have developed has a large capacity solid state memory, which memorizes the special sound composed of these kinds of reverberation signals. The reverberator has some switch functions to change the initial delay time and duration of the following continuous reverberation components. The principle and the practical design of this digital reverberator are described in this paper.
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