additional features for peak picking

tones.c

@@ -0,0 +1,35 @@
+
+#include <stdio.h>
+#include <string.h>
+#include <memory.h>
+#include <malloc.h>
+#include <stdio.h>
+#include <math.h>
+#include "kiss_fft.h"
+
+#define PI 3.14159
+
+int main(int argc, char ** argv)
+{
+    int k;
+    float fs=44100;
+
+    float fr=1,fl=300;
+
+    float th[2] = {0,0};
+    float thinc[2] = {2*PI*fr/fs,2*PI*fl/fs };
+
+    while (1){
+        for (k=0;k<2;++k){
+            short s;
+            th[k] += thinc[k];
+            if (th[k] > 2*PI){
+                th[k] -= 2*PI;
+            }
+            s=(short)32767*cos( th[k] );
+            fwrite(&s,sizeof(s),1,stdout);
+        }
+    }
+
+    return 0;
+}