Format Y-8 requires 2 cardiod and an 8 Figures.
Purpose: The Y format provides 4 channel of Surround encoding on a 270° degrees. The reject of the 8 is used as psicoacoustic dominance for the Sl and Sr channel.
On the Field X-Mat you address L and R mic on L and R channel on phase and on bus 3 and 4 out of phase for compensating the 8 reject.
Bus 3 and 4 must be at 1/2 level comparing bus 1 and 2 in order to maintain the dominance. ¾
stereo encoding (DAT etc.)
Figure 8 at same distance from cardiod to preserve phase for common signals.