From 49687d4e5d2acbd5bf745a7c6e2ae7461a42833d Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Wed, 9 Oct 2019 11:01:04 +1100
Subject: [PATCH] AP_HAL_SITL: ToneAlarm doesn't play tones if disabled via
 param

---
 libraries/AP_HAL_SITL/ToneAlarm_SF.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libraries/AP_HAL_SITL/ToneAlarm_SF.cpp b/libraries/AP_HAL_SITL/ToneAlarm_SF.cpp
index 66e43682fe..035e9341f7 100644
--- a/libraries/AP_HAL_SITL/ToneAlarm_SF.cpp
+++ b/libraries/AP_HAL_SITL/ToneAlarm_SF.cpp
@@ -20,6 +20,10 @@ Synth::sEnvelope envelope;
 
 void ToneAlarm_SF::set_buzzer_tone(float frequency, float volume, float duration_ms)
 {
+    if (!AP::sitl()->tonealarm_sim.is_enabled()) {
+        return;
+    }
+
     if (frequency <= 0) {
         return;
     }