Balance Property

Summary

Gets or sets the balance value of the audio stream for the preview output.

Syntax
C#
VB
C++
public virtual int Balance { get; set; } 
Public Overridable Property Balance As Integer 
public: 
virtual property int Balance { 
   int get(); 
   void set (    int ); 
} 

Property Value

A value representing the balance.

Remarks

Allowed values range from -10000 to 10000, where -10000 indicates that the right channel will receive no signal, 10000 indicates that the left channel will receive no signal, and 0 indicates that both channels will get the same amount of the audio signal. This property applied on the preview output only, the audio stream in the captured content will not be affected.

Example
C#
VB
using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void CaptureAudioExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   // output file for capture 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_CaptureAudioExample.mp3"); 
 
   try 
   { 
      // select a audio capture device 
      if (capturectrl.AudioDevices["USB"] == null) 
         throw new Exception("No USB audio device available"); 
 
      capturectrl.AudioDevices["USB"].Selected = true; 
 
      // set the audio compressor 
      capturectrl.AudioCompressors.AC3.Selected = true; 
 
      // set the target output file and format 
      capturectrl.TargetFile = outFile; 
      capturectrl.TargetFormat = TargetFormatType.MP3; 
 
      // unmute the audio, balanced and full volume 
      capturectrl.Mute = false; 
      capturectrl.Balance = 0; 
      capturectrl.Volume = 0; 
 
      // check whether we can capture audio 
      if (capturectrl.IsModeAvailable(CaptureMode.Audio)) 
      { 
         capturectrl.TimeLimit = 5;      // just 5 seconds of capture time 
         capturectrl.UseTimeLimit = true; 
 
         // start the capture process 
         capturectrl.StartCapture(CaptureMode.Audio); 
 
         // we'll loop on the state and pump messages for this example. 
         // but you should not need to if running from a Windows Forms application. 
         while (capturectrl.State == CaptureState.Running) 
            Application.DoEvents(); 
 
         // set the result 
         _result = File.Exists(outFile); 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"; 
} 
Imports Leadtools 
Imports Leadtools.Multimedia 
Imports LeadtoolsMultimediaExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As CaptureCtrlForm = New CaptureCtrlForm() 
 
Public Sub CaptureAudioExample() 
   ' reference the capture control 
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
 
   ' output file for capture 
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_CaptureAudioExample.mp3") 
 
   Try 
      ' select a audio capture device 
      If capturectrl.AudioDevices("USB") Is Nothing Then 
         Throw New Exception("No USB audio device available") 
      End If 
 
      capturectrl.AudioDevices("USB").Selected = True 
 
      ' set the audio compressor 
      capturectrl.AudioCompressors.AC3.Selected = True 
 
      ' set the target output file and format 
      capturectrl.TargetFile = outFile 
      capturectrl.TargetFormat = TargetFormatType.MP3 
 
      ' unmute the audio, balanced and full volume 
      capturectrl.Mute = False 
      capturectrl.Balance = 0 
      capturectrl.Volume = 0 
 
      ' check if we have can capture audio 
      If capturectrl.IsModeAvailable(CaptureMode.Audio) Then 
         capturectrl.TimeLimit = 5 ' just 5 seconds of capture time 
         capturectrl.UseTimeLimit = True 
 
         ' start the capture process 
         capturectrl.StartCapture(CaptureMode.Audio) 
 
         ' we'll loop on the state and pump messages for this example. 
         ' but you should not need to if running from a Windows Forms application. 
         Do While capturectrl.State = CaptureState.Running 
            Application.DoEvents() 
         Loop 
 
         ' set the result 
         _result = File.Exists(outFile) 
      End If 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media" 
End Class 
Requirements

Target Platforms

Help Version 20.0.2019.11.25
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Leadtools.Multimedia Assembly