diff --git a/driver/bk4819.c b/driver/bk4819.c
index b102b29..5d8d246 100644
--- a/driver/bk4819.c
+++ b/driver/bk4819.c
@@ -126,7 +126,7 @@ void BK4819_Init(void)
 	BK4819_write_reg(0x11, 0x027B);
 	BK4819_write_reg(0x10, 0x007A);
 	BK4819_write_reg(0x14, 0x0019);
-	BK4819_write_reg(0x49, 0x2A38);
+	BK4819_write_reg(0x49, 0x2A38);  // 00 1010100 0111000
 	BK4819_write_reg(0x7B, 0x8420);
 
 	BK4819_write_reg(0x1E, 0x4C58);  // ???
@@ -442,7 +442,6 @@ void BK4819_EnableVox(uint16_t VoxEnableThreshold, uint16_t VoxDisableThreshold)
 void BK4819_set_TX_deviation(uint16_t deviation)
 {
 //	const uint8_t scrambler = (BK4819_read_reg(0x31) >> 1) & 1u;
-//	uint16_t deviation = narrow ? 900 : 1232;
 //	if (scrambler)
 //		deviation -= 200;
 	if (deviation > 4095)
@@ -780,6 +779,8 @@ void BK4819_SetCompander(const unsigned int mode)
 	if (mode == COMPAND_OFF)
 	{	// disable
 		BK4819_write_reg(0x31, r31 & ~(1ul << 3));
+		BK4819_write_reg(0x29, 0);
+		BK4819_write_reg(0x28, 0);
 		return;
 	}
 
diff --git a/firmware.bin b/firmware.bin
index cfbc708..3332b86 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index ce5d2e3..9219a58 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ