Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F107xx/SPI1/I2SPR#0x0
I2S prescaler register
I2S Linear prescaler
Odd factor for the prescaler
Master clock output enable
https://github.com/cmsis-svd/cmsis-svd-data