play sounds with a buzzer

Dependencies:   mbed

Revision:
0:586507ee54a5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon May 09 19:50:27 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/aae6fcc7d9bb
\ No newline at end of file