From e58a06465c8d6d0e2aadf2206c9282881577c9ec Mon Sep 17 00:00:00 2001
From: James Turner <james@flightgear.org>
Date: Mon, 2 Aug 2021 09:21:07 +0100
Subject: [PATCH] AI ATC: only use audio if enabled in the dialog

Patch by Stefan Frank, check the dialog checkbox setting before sending
messages to audio rather than text output.
---
 src/ATC/trafficcontrol.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/ATC/trafficcontrol.cxx b/src/ATC/trafficcontrol.cxx
index c2e723320..7326e1b61 100644
--- a/src/ATC/trafficcontrol.cxx
+++ b/src/ATC/trafficcontrol.cxx
@@ -812,7 +812,8 @@ void FGATCController::transmit(FGTrafficRecord * rec, FGAirportDynamics *parent,
         break;
     }
     
-    if (audible) {
+    const bool atcAudioEnabled = fgGetBool("/sim/sound/atc/enabled", false);
+    if (audible && atcAudioEnabled) {
         double onBoardRadioFreq0 =
             fgGetDouble("/instrumentation/comm[0]/frequencies/selected-mhz");
         double onBoardRadioFreq1 =