Index: firmware/App/HDCommon.h
===================================================================
diff -u -r933a18d740285e70be9d00696ed0f5a5381bc8e4 -rd13534495f6b9ea565c38ea88e9bc658c3325636
--- firmware/App/HDCommon.h	(.../HDCommon.h)	(revision 933a18d740285e70be9d00696ed0f5a5381bc8e4)
+++ firmware/App/HDCommon.h	(.../HDCommon.h)	(revision d13534495f6b9ea565c38ea88e9bc658c3325636)
@@ -37,6 +37,7 @@
 //    #define BREADBOARD_TARGET               1           // old breadboard system build - no longer used?
 //    #define SIMULATE_UI                     1           // build w/o requirement that UI be there
 //    #define TASK_TIMING_OUTPUT_ENABLED      1           // re-purposes alarm lamp pins for task timing
+//    #define DISABLE_ALARM_AUDIO             1           // disable alarm audio
     #define SKIP_POST                       1           // skip POST tests - all pass
 //    #define LIMITED_NVDATA_CRC_CHECKS       1           // only perform POST CRC checks on nv-data records that are implemented so far
     #define DISABLE_AIR_TRAP_LEVELING       1           // disable air trap level control