“Virtual
Ambisonics” surround
lMeasurement of 3D (B-format) impulse responses
in theatres, with two source positions
on the stage
lThe IRs are processed, deriving the responses of
several directive microphones
lEach
soundtrack of the original stereo recording is convolved with the corresponding
IR
lFor
each loudspeaker, the results of the two convolutions are mixed
7 spaced omni Soundfield MK-V B&K WA0447