diff -up gt-0.4/utils/unsf.c~ gt-0.4/utils/unsf.c
--- gt-0.4/utils/unsf.c~	2008-02-03 13:45:08.000000000 +0100
+++ gt-0.4/utils/unsf.c	2008-02-03 13:45:08.000000000 +0100
@@ -1462,7 +1462,7 @@ convert_lfo (void)
 static void convert_tremolo(void)
 {
 	int level;
-	unsigned int freq;
+	int freq;
 
 	sp_tremolo_phase_increment = sp_tremolo_sweep_increment = sp_tremolo_depth = 0;