History and current state of the war between the two main approaches to surround sound: discrete speaker feeds versus hierarchical matrix

40th AES Conference - Tokyo, 8-10 October 2010

Several “standard” setups were developed

Discrete microphone arrays

• OCT-surround

C : Cardioid, 0°
L, R : Cardioid, ± 90°
LS, RS : Cardioid, ± 180°

• Fukuda tree

C : Cardioid, 0°
L, R : Cardioid, ± 45°
LS, RS : Cardioid, ± 135°

LL, RR: Omni