diff --git a/firmware/Include/bd3491.h b/firmware/Include/bd3491.h
index d603bbe..1786a7b 100644
--- a/firmware/Include/bd3491.h
+++ b/firmware/Include/bd3491.h
@@ -6,6 +6,11 @@
 
 #include "stm32f1xx_hal.h"
 
+#define BD_INPUT_MUTE (1<<4)
+#define BD_INPUT_ALL (1<<5)
+
+// number can either be 0-5 (meaning CHANNEL1  to CHANNEL 6) 
+// or BD_INPUT_MUTE or BD_INPUT_SHORT 
 void bd_set_input(I2C_HandleTypeDef * handle, uint8_t number);
 
 #define BD_MAX_GAIN 20 // gain in db
diff --git a/firmware/Src/bd3491.c b/firmware/Src/bd3491.c
index b753bb8..7ff6e04 100644
--- a/firmware/Src/bd3491.c
+++ b/firmware/Src/bd3491.c
@@ -17,12 +17,24 @@ void bd_write_reg(I2C_HandleTypeDef * handle, uint8_t reg, uint8_t data) {
 	HAL_I2C_Master_Transmit(handle, 0b10000010, out, sizeof(out), HAL_MAX_DELAY);
 }
 
-void bd_set_input(I2C_HandleTypeDef * handle, uint8_t number) {
-	if (number > 5) {
-		return;
-	}
 
-	bd_write_reg(handle, 0x04, number);
+#define BD_INPUT_TABLE(a) \
+	a(0, 0) \
+	a(1, 1) \
+	a(2, 2) \
+	a(3, 3) \
+	a(4, 4) \
+	a(5, 6) \
+	a(BD_INPUT_ALL, 5) \
+	a(BD_INPUT_MUTE, 7) 
+
+
+void bd_set_input(I2C_HandleTypeDef * handle, uint8_t number) {
+#define INPUT_CASE(num, out) case num: bd_write_reg(handle, 0x04, out); break;
+	switch(number) {
+	BD_INPUT_TABLE(INPUT_CASE)
+	}
+#undef INPUT_CASE
 }
 
 #define BD_GAIN_TABLE(a) \