diff --git a/JianGongYun/TRTC/LiveClassroom.cs b/JianGongYun/TRTC/LiveClassroom.cs
index 9d64b45..fd7f8b9 100644
--- a/JianGongYun/TRTC/LiveClassroom.cs
+++ b/JianGongYun/TRTC/LiveClassroom.cs
@@ -114,14 +114,7 @@ namespace JianGongYun.TRTC
             }
             lTXDeviceManager.setCurrentDeviceVolume(TRTCDeviceType.TXMediaDeviceTypeMic, settingWindowViewModel.MicVolume);//麦克风采集音量
             lTRTCCloud.setSystemAudioLoopbackVolume(settingWindowViewModel.SytemGatherVolume);//系统声音采集音量
-            if (settingWindowViewModel.AudioSource == "2")
-            {
-                lTRTCCloud.startSystemAudioLoopback(null);
-            }
-            else
-            {
-                lTRTCCloud.stopSystemAudioLoopback();
-            }
+            
             //设备完结
 
             //liveWinMode.LoadAllScreen();
@@ -367,6 +360,24 @@ namespace JianGongYun.TRTC
                 lTRTCCloud.stopAudioRecording();
             }
         }
+        public static void EnableAudio()
+        {
+             if (settingWindowViewModel.AudioSource == "1")
+            {
+                lTRTCCloud.muteLocalAudio(false);
+                lTRTCCloud.stopSystemAudioLoopback();
+            }
+            else if (settingWindowViewModel.AudioSource == "2")
+            {
+                lTRTCCloud.muteLocalAudio(true);
+                lTRTCCloud.startSystemAudioLoopback(null);
+            }
+            else if (settingWindowViewModel.AudioSource == "3")
+            {
+                lTRTCCloud.muteLocalAudio(false);
+                lTRTCCloud.startSystemAudioLoopback(null);
+            }
+        }
         /// <summary>
         /// 关闭麦克风
         /// </summary>
@@ -390,7 +401,17 @@ namespace JianGongYun.TRTC
             if (liveWinMode.MicRunning)
             {
                 liveWinMode.MicMute = mute.HasValue ? mute.Value : !liveWinMode.MicMute;
-                lTRTCCloud.muteLocalAudio(liveWinMode.MicMute);
+                if (liveWinMode.MicMute)
+                {
+                    lTRTCCloud.muteLocalAudio(true);
+                    lTRTCCloud.stopSystemAudioLoopback();
+
+                }
+                else
+                {
+                    EnableAudio();
+                }
+                //lTRTCCloud.muteLocalAudio(liveWinMode.MicMute);
             }
         }
 
diff --git a/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs b/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs
index b1da095..914b988 100644
--- a/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs
+++ b/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs
@@ -173,12 +173,12 @@ namespace JianGongYun.TRTC.ViewModels
                 if (_AudioSource == "1")//只采集麦克风，关闭系统音采集
                 {
                     ShowSytemGatherSlider = Visibility.Collapsed;
-                    LiveClassroom.lTRTCCloud.stopSystemAudioLoopback();
+                    //LiveClassroom.lTRTCCloud.stopSystemAudioLoopback();
                 }
-                else if (_AudioSource == "2")//麦和系统音，开启采集系统音
+                else if (_AudioSource == "2" || _AudioSource == "3")//麦和系统音，开启采集系统音
                 {
                     ShowSytemGatherSlider = Visibility.Visible;
-                    LiveClassroom.lTRTCCloud.startSystemAudioLoopback(null);
+                    //LiveClassroom.lTRTCCloud.startSystemAudioLoopback(null);
                 }
                 if (PropertyChanged != null)
                 {
@@ -195,7 +195,7 @@ namespace JianGongYun.TRTC.ViewModels
         {
             get
             {
-                if (AudioSource == "2")
+                if (AudioSource == "2"||AudioSource=="3")
                 {
                     _ShowSytemGatherSlider = Visibility.Visible;
                 }
diff --git a/JianGongYun/TRTC/Windows/LiveWindow.xaml b/JianGongYun/TRTC/Windows/LiveWindow.xaml
index aa31eb4..707a10b 100644
--- a/JianGongYun/TRTC/Windows/LiveWindow.xaml
+++ b/JianGongYun/TRTC/Windows/LiveWindow.xaml
@@ -88,8 +88,8 @@
                 </Button>
                 <StackPanel Visibility="{Binding IsLive, Converter={StaticResource VisibilityOfBool}}" Orientation="Horizontal" Canvas.Right="27" Canvas.Top="10" Height="50">
                     <Canvas HorizontalAlignment="Right" Height="50" Width="50">
-                        <Metro:AduSysButton ToolTip="禁用/启用麦克风静音" Click="SetMute_Click" Foreground="#aaaaaa" IconHeight="25" IconWidth="18" CornerRadius="6" Height="50" Width="50" Icon="{StaticResource Icon_Mic}" Content="" />
-                        <Metro:AduSysButton ToolTip="禁用/启用麦克风静音" Click="SetMute_Click" Visibility="{Binding MicMute, Converter={StaticResource VisibilityOfBool}}" Foreground="#aaaaaa" IconHeight="25" IconWidth="25" CornerRadius="6" Height="50" Width="50" Icon="{StaticResource Icon_Ban}" Content="" />
+                        <Metro:AduSysButton ToolTip="禁用/启用声音" Click="SetMute_Click" Foreground="#aaaaaa" IconHeight="25" IconWidth="18" CornerRadius="6" Height="50" Width="50" Icon="{StaticResource Icon_Mic}" Content="" />
+                        <Metro:AduSysButton ToolTip="禁用/启用声音" Click="SetMute_Click" Visibility="{Binding MicMute, Converter={StaticResource VisibilityOfBool}}" Foreground="#aaaaaa" IconHeight="25" IconWidth="25" CornerRadius="6" Height="50" Width="50" Icon="{StaticResource Icon_Ban}" Content="" />
                     </Canvas>
                     <Canvas HorizontalAlignment="Right" Height="50" Width="50">
                         <Metro:AduSysButton ToolTip="禁用/启用摄像头" Click="SetCamera_Click" Foreground="#aaaaaa" IconHeight="25" IconWidth="20" CornerRadius="6" Height="50" Width="50" Icon="{StaticResource Icon_Camera}" Content="" />
@@ -174,7 +174,7 @@
                 <Grid Canvas.Top="0" Canvas.Left="0" Height="{Binding ElementName=CusContent,Path=ActualHeight}" Width="{Binding ElementName=CusContent,Path=ActualWidth}" Visibility="{Binding IsLive, Converter={StaticResource VisibilityOfBool}}">
                     <Canvas x:Name="AfterLivePanel">
                         <Grid  Visibility="{Binding MicMute, Converter={StaticResource UnVisibilityOfBool}}" Width="{Binding ElementName=AfterLivePanel,Path=ActualWidth}" Height="{Binding ElementName=AfterLivePanel,Path=ActualHeight}" Canvas.Top="0" Canvas.Left="0">
-                            <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="#aaaaaa" FontSize="14" >仅开启麦克风</TextBlock>
+                            <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="#aaaaaa" FontSize="14" >仅开启声音</TextBlock>
                         </Grid>
                         <Grid  Visibility="{Binding MicMute, Converter={StaticResource VisibilityOfBool}}" Width="{Binding ElementName=AfterLivePanel,Path=ActualWidth}" Height="{Binding ElementName=AfterLivePanel,Path=ActualHeight}" Canvas.Top="0" Canvas.Left="0">
                             <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="#aaaaaa" FontSize="14" >所有设备被关闭</TextBlock>
diff --git a/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs b/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs
index 45ceb5d..feba1c3 100644
--- a/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs
+++ b/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs
@@ -159,7 +159,8 @@ namespace JianGongYun.TRTC.Windows
                     {
                         LiveClassroom.VideoRecordTask(ref onEnd);//启动录制
                     }
-                    LiveClassroom.SetMicMute(false);
+
+                    LiveClassroom.EnableAudio();
 
                 }, SettingWindowViewModel.ScreenRecordingCountdown);
             }
diff --git a/JianGongYun/TRTC/Windows/SettingWindow.xaml b/JianGongYun/TRTC/Windows/SettingWindow.xaml
index 2084c52..d0351e7 100644
--- a/JianGongYun/TRTC/Windows/SettingWindow.xaml
+++ b/JianGongYun/TRTC/Windows/SettingWindow.xaml
@@ -45,7 +45,8 @@
                             <TextBlock Style="{StaticResource SettingItemText}" DockPanel.Dock="Left"> 音频来源</TextBlock>
                             <Metro:AduComboBox Margin="0 0 10 0" SelectedValuePath="Tag" SelectedValue="{Binding AudioSource}" ComBoxItemPanelBackground="{StaticResource ComboBoxBrush}">
                                 <ComboBoxItem Content="仅麦克风" Tag="1"/>
-                                <ComboBoxItem Content="麦和系统声音" Tag="2" />
+                                <ComboBoxItem Content="仅系统声音" Tag="2" />
+                                <ComboBoxItem Content="麦和系统声音" Tag="3" />
                             </Metro:AduComboBox>
                         </DockPanel>
                         <DockPanel Visibility="{Binding ShowSytemGatherSlider}" Style="{StaticResource SettingItem}">