--- a
+++ b/mpd2src/audioutil.h
@@ -0,0 +1,22 @@
+/* Copyright (C) 2015 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 _AUDIOUTIL_H_INCLUDED_
+#define _AUDIOUTIL_H_INCLUDED_
+
+extern void swapSamples(unsigned char *data, int bytesPerSamp, int scount);
+
+#endif /* _AUDIOUTIL_H_INCLUDED_ */