diff --git a/const.h b/const.h
index 0a1282b..f5e015b 100644
--- a/const.h
+++ b/const.h
@@ -7,5 +7,9 @@
 #define MUX0 26
 #define MUX1 27
 
+#define VCO_BUTTON 6
+#define QUANT_BUTTON 7
+#define AMEN_BUTTON 8
+
 #define AUDIO_OUTPUT 0
 #define STATUS_LED 1
\ No newline at end of file