Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F427/SAI1/ACR2#0x0
AConfiguration register 2
FIFO threshold
FIFO flush
Tristate management on data line
Mute
Mute value
Mute counter
Complement bit
Companding mode
https://github.com/cmsis-svd/cmsis-svd-data