diff --git a/board/drivers/sound.h b/board/drivers/sound.h
index 60bb645a64..57eaa85f56 100644
--- a/board/drivers/sound.h
+++ b/board/drivers/sound.h
@@ -55,8 +55,8 @@ void sound_init(void) {
   register_set(&SAI4_Block_B->SLOTR, (0b11 << SAI_xSLOTR_SLOTEN_Pos) | (1U << SAI_xSLOTR_NBSLOT_Pos) | (0b01 << SAI_xSLOTR_SLOTSZ_Pos), 0xFFFF0FDFU); // NBSLOT definition is vague
 
   // mono mic out
-  register_set(&SAI1->PDMCR, (0b1 << SAI_PDMCR_CKEN2_Pos) | (0b00 << SAI_PDMCR_MICNBR_Pos) | (0b1 << SAI_PDMCR_PDMEN_Pos), 0x331);
-  register_set(&SAI4_Block_A->CR1, (0b01 << SAI_xCR1_SYNCEN_Pos) | (0b100 << SAI_xCR1_DS_Pos) | (0b10 << SAI_xCR1_MODE_Pos), 0x0FFB3FEFU);
+  register_set(&SAI4->PDMCR, (0b1 << SAI_PDMCR_CKEN2_Pos) | (0b01 << SAI_PDMCR_MICNBR_Pos) | (0b1 << SAI_PDMCR_PDMEN_Pos), 0x331);
+  register_set(&SAI4_Block_A->CR1, (26U << SAI_xCR1_MCKDIV_Pos) | SAI_xCR1_NODIV | (0b00 << SAI_xCR1_SYNCEN_Pos) | (0b100 << SAI_xCR1_DS_Pos) | (0b01 << SAI_xCR1_MODE_Pos), 0x0FFB3FEFU);
   register_set(&SAI4_Block_A->CR2, 0U, 0xFFFBU);
   register_set(&SAI4_Block_A->FRCR, (31U << SAI_xFRCR_FRL_Pos), 0x7FFFFU);
   register_set(&SAI4_Block_A->SLOTR, (0b11 << SAI_xSLOTR_SLOTEN_Pos) | (1U << SAI_xSLOTR_NBSLOT_Pos) | (0b01 << SAI_xSLOTR_SLOTSZ_Pos), 0xFFFF0FDFU); // NBSLOT definition is vague