old demo that i want to try in mbed studio

Dependencies:   mbed SDFileSystem_Copy_of_mbed_version I2S

Revision:
36:569ec4335f92
Parent:
35:4469b508dda3
Child:
37:a563899ac0df
--- a/NotchingDemo.cpp	Mon May 27 17:43:08 2019 +0000
+++ b/NotchingDemo.cpp	Mon May 27 19:44:22 2019 +0000
@@ -144,6 +144,7 @@
 //add a class constructor
     WAV_FILE_STRUCT FileInfo;
     short * data_sptr;
+    string file_location;
     //classSoundFile(string filename);//this is the constructor
     //string filename;
 };