Two new equipments for producing artificial reverberation are discussed. One is used to increase the effective reverberation time of churches or other auditoriums where the natural reverberation time is below the desired value. The other is intended for audio studio application to introduce special effects. The artificial reverberation is produced in a magnetically-recorded multiple-output memory system. In the auditorium application, the reverberation information is fed to a series of side-wall speakers which simulate a series of reflecting surfaces, each set receiving its own distinctive reverberant information. In both auditorium and studio applications, the reverberation time and reverberation frequency response can be controlled over a wide range.
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