diff --git a/src/synth/vco.c b/src/synth/vco.c
index c9f7088..62af8d3 100644
--- a/src/synth/vco.c
+++ b/src/synth/vco.c
@@ -2,16 +2,11 @@
 // --------------------------------------------------------------
 #include <string.h>
 #include <stdlib.h>
-#include <math.h>
 
 #include "synth_defs.h"
 #include "blit.h"
 #include "vco.h"
 #include "wavetable.h"
-#include "fir/fir2.h"
-
-extern unsigned char _g_wave_rawdata[38400];
-extern wt_descr_t _g_wt_descr[WT_NUM_WAVETABLES];
 
 // --------------------------------------------------------------
 // internal funcs
diff --git a/src/synth/vco.h b/src/synth/vco.h
index d338cc0..d447869 100644
--- a/src/synth/vco.h
+++ b/src/synth/vco.h
@@ -37,7 +37,6 @@ typedef struct _svco_common_t
 {
 	blit_common_t blit;
 	wt_common_t wt;
-//	synth_float_t wavetable[300][128];
 
 } vco_common_t;