From 8abc49af1f5a70170af7a12aa04381b772ee3b1f Mon Sep 17 00:00:00 2001
From: thrust26 <tjentzsch@yahoo.de>
Date: Fri, 1 Dec 2017 21:15:11 +0100
Subject: [PATCH] fixed effective volume for C = 0

---
 src/debugger/gui/AudioWidget.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/debugger/gui/AudioWidget.cxx b/src/debugger/gui/AudioWidget.cxx
index 2c267a4ea..b977295f5 100644
--- a/src/debugger/gui/AudioWidget.cxx
+++ b/src/debugger/gui/AudioWidget.cxx
@@ -200,6 +200,7 @@ void AudioWidget::changeControlRegs()
       instance().debugger().tiaDebug().audC1(value);
       break;
   }
+  handleVolume();
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -230,6 +231,6 @@ uInt32 AudioWidget::getEffectiveVolume()
     70, 72, 75, 78, 80, 82, 85, 87,
     89, 91, 93, 95, 97, 98,100};
 
-  return EFF_VOL[instance().debugger().tiaDebug().audV0() +
-    instance().debugger().tiaDebug().audV1()];
+  return EFF_VOL[(instance().debugger().tiaDebug().audC0() ? instance().debugger().tiaDebug().audV0() : 0) +
+    (instance().debugger().tiaDebug().audC1() ? instance().debugger().tiaDebug().audV1() : 0)];
 }