11/01/15

PRINCIPLES OF THE IRT CROSS TECHNIQUE

The IRT Cross is designed for ambiance pickup. The setup consists of four cardioid microphones.
The IRT cross is designed for capturing the ambient/diffuse part of a surround sound recording. It is a four microphone square with 20–25 cm (7.9–9.8 in) between the cardioid microphones, which are routed to left, right, left surround and right surround in an appropriate level compared to a front-array.

The IRT Cross is normally positioned a couple of meters behind the main array. However, it should not be placed too far away as there may occur timing problems (like an echo) in the reproduced signal. The optimal placing of the cross is a balance between getting enough ambiance while at the same time avoiding echo.


Suggested microphones, capsules, kits and accessories

d:dicate™ 4011A
d:dicate™ 4011C
d:dicate™ MMC4011
d:dicate™ MMP ER/ES
d:dicate™ ST4011A Stereo Pair with 4011A Cardioids
SB400 Stereo Boom, Modular
UA0837 Stereo Boom
 

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