Background
lThe title of this paper is exactly the same employed by Michael Gerzon in its JAES paper (Vol. 23, Number 7, 1975)
lHe first proposed to collect impulse responses measured in famous theatres, with a microphone capable of capturing the complete spatial information
lThis paper is consequently basically a tribute to M.Gerzon, who had foreseen most of the modern multichannel audio applications, including impulse response measurements and auralization obtained by convolution.
l