STM32F745 2SAI(FULLDUPLEX) <-> DMA<->ADC,DAC

[Valik_666]

How i can to do 2 way sound with audio processing from SAI to ADC,DAC with DMA ? I already did with ADC->DMA->DAC with 3buffers. Now i'm trying to do ADC,DAC<->DMA(6-buffers)<->SAI

Thanks...