--- a
+++ b/upsend_src/wav.h
@@ -0,0 +1,23 @@
+/* Copyright (C) 2014 J.F.Dockes
+ *	 This program is free software; you can redistribute it and/or modify
+ *	 it under the terms of the GNU General Public License as published by
+ *	 the Free Software Foundation; either version 2 of the License, or
+ *	 (at your option) any later version.
+ *
+ *	 This program is distributed in the hope that it will be useful,
+ *	 but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	 GNU General Public License for more details.
+ *
+ *	 You should have received a copy of the GNU General Public License
+ *	 along with this program; if not, write to the
+ *	 Free Software Foundation, Inc.,
+ *	 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#ifndef _WAV_H_INCLUDED_
+#define _WAV_H_INCLUDED_
+
+extern int makewavheader(char *buf, int maxsize, int freq, int bits, 
+                         int chans, unsigned int databytecnt);
+
+#endif /* _WAV_H_INCLUDED_ */