ITU 5.1 surround
lWilliams MMA
24th AES International Conference
Schematic of the setup
C : Cardioid, 0°
L, R : Cardioid, ± 40°
LS, RS : Cardioid,  ± 120°
l    INA-5
Schematic of the setup
C : Cardioid, 0°
L, R : Cardioid, ± 90°
LS, RS : Cardioid,  ± 150°