Abstract
A series of tests has been carried out, and recordings made, to identify some of the problems that will be encountered in recording and reproducing quadraphonic programme material. Various microphone and loudspeaker arrangements have been evaluated with the main aim of re-creating, in the listening room, the acoustic qualities - ambience, spaciousness, etc. - of the original environment. In the case of orchestral music this aim is the re-creation of all the acoustic qualities of the best seat in a concert hall.
Recommendations are made with regard to future work on special microphones for quadraphonic use.
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