Index: firmware/App/Services/FPGA.c
===================================================================
diff -u -r172b320a1007769c7452fe3f1cc7ac85b016f89a -rfc12876da6930c955864352182aee2076513a1cc
--- firmware/App/Services/FPGA.c	(.../FPGA.c)	(revision 172b320a1007769c7452fe3f1cc7ac85b016f89a)
+++ firmware/App/Services/FPGA.c	(.../FPGA.c)	(revision fc12876da6930c955864352182aee2076513a1cc)
@@ -99,6 +99,7 @@
 #define FPGA_PBO_TEMP_OFFSET            50.0                    ///< Used in conversion of PBo temperature reading to deg C.
 
 #define FPGA_ALARM_AUDIO_VOLUME_SHIFT   3                       ///< Shift alarm audio volume 3 bits to left before writing to register.
+#define FPGA_ALARM_AUDIO_DIVIDE_SHIFT   6                       ///< Shift alarm audio volume divider 6 bits to left before writing to register.
 
 #define FPGA_BACKUP_ALARM_AUDIO_CONVERT 0.4                     ///< Converts backup (piezo) alarm audio ADC volts to amps.
 
@@ -1099,25 +1100,31 @@
  * state and volume.
  * @details Inputs: none
  * @details Outputs: alarm audio state and attenuation set
- * @param state the state of alarm audio to command:
+ * @param state the state of alarm audio to command (3..5):
  *          0 - No alarm tone
  *          1 - Low priority alarm tone (c e)
  *          2 - Medium priority alarm tone (c f# c)
  *          3 - High priority alarm tone (c f# c - c f#)
  *          4 - Continuous test tone (e)
- * @param volumeLevel the level of attenuation to command (0..4)
+ * @param volumeLevel the level of attenuation to command (0..2):
  *          4 - 3 dB gain
  *          3 - 6 dB gain
  *          2 - 9 dB gain
  *          1 - 12 dB gain
  *          0 - 15 dB gain
+ * @param volumeDivider further attenuation via divider (6..7):
+ *          0 - Divide by 2
+ *          1 - Divide by 4
+ *          2 - Divide by 8
+ *          3 - Divide by 16
  * @return none
  *************************************************************************/
-void setAlarmAudioState( U32 state, U32 volumeLevel )
+void setAlarmAudioState( U32 state, U32 volumeLevel, U32 volumeDivider )
 {
     U08 audioCmd = (U08)state;
 
     audioCmd |= ( (U08)volumeLevel << FPGA_ALARM_AUDIO_VOLUME_SHIFT );
+    audioCmd |= ( (U08)volumeDivider << FPGA_ALARM_AUDIO_DIVIDE_SHIFT );
 
     if ( ( state <= NUM_OF_ALARM_PRIORITIES ) && ( volumeLevel <= MAX_ALARM_VOLUME_ATTENUATION ) )
     {