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Posted 9 Jan 2000

Simple Mixer Control Wrapper

, 9 Jan 2000
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A small audio mixer control wrapper
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    This is small and useful C++ class which can encapsulate any windows multimedia mixer control.

    I wrote a simple class CAlexfMixer to wrap any multimedia mixer control. You can manipulate the Master Volume, Mute or someone elses mixer control with this class, as long as the control support these operations. You can also retrieve information such as the Peak Meter.

    Let's look at class definition:

    class CAlexfMixer
      HMIXER m_HMixer;
      INT m_iMixerControlID;
      MMRESULT mmr;
      DWORD m_dwChannels;
      BOOL m_bSuccess;
      void ZeroAll();
      BOOL IsOk() {return m_bSuccess;};
      BOOL On();
      BOOL Off();
      DWORD GetControlValue();
      BOOL SetControlValue(DWORD dw);
      CAlexfMixer(DWORD DstType, DWORD SrcType, DWORD ControlType);
      CAlexfMixer(HWND hwnd, DWORD DstType, DWORD SrcType, DWORD ControlType);
      virtual ~CAlexfMixer();

    The class has two constructors - with and without the callback window.

    The class has member IsOk to check whether the specified control can be manipulated, and member functions to get and set the control's state.

    How it works

    Example 1. Master Volume Control.

    if (!mixer.IsOk()) 

    First we create an object associated with the Master Volume meter control. The third parameter NO_SOURCE is a constant defined in the header file. It means that the control does not have a source line, only a destination line.

    Second we check if is this type of control available or not.

    Finally, we set the volume to 500.

    Example 2. Master Mute.


    Here we create an object associated with Master Mute control, and turn it off.


    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

    A list of licenses authors might use can be found here


    About the Author

    Alexander Fedorov
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    Comments and Discussions

    GeneralRe: Unmute does not work to wave too Pin
    sabit23-Jun-06 19:10
    membersabit23-Jun-06 19:10 
    Generalexcuse me Pin
    NeverGrief21-Nov-02 7:37
    memberNeverGrief21-Nov-02 7:37 
    GeneralQuestion about using this class Pin
    Anonymous20-Aug-02 4:22
    sussAnonymous20-Aug-02 4:22 
    QuestionAbout Recording Control? Pin
    Anonymous8-Aug-02 21:26
    sussAnonymous8-Aug-02 21:26 
    AnswerRe: About Recording Control? Pin
    Anonymous11-Aug-02 6:43
    sussAnonymous11-Aug-02 6:43 
    Generalmix several wav fils Pin
    ER__6-Jan-02 10:55
    memberER__6-Jan-02 10:55 
    GeneralRe: mix several wav fils Pin
    PeteCIS5-Feb-02 8:47
    memberPeteCIS5-Feb-02 8:47 
    GeneralRe: mix several wav fils Pin
    mice16-Aug-02 23:54
    membermice16-Aug-02 23:54 
    if i am talking with two person at the same time.i should mix the voice of i can do that.
    GeneralRe: mix several wav fils Pin
    begray14-Oct-05 22:45
    memberbegray14-Oct-05 22:45 
    GeneralGREAT! And yet so simple! Amazing Pin
    Peter B. Hardwick3-Oct-01 17:54
    memberPeter B. Hardwick3-Oct-01 17:54 
    GeneralDoes not work Pin
    Anonymous2-Jul-01 11:30
    memberAnonymous2-Jul-01 11:30 
    GeneralRecording information Pin
    roland22-Nov-00 7:14
    memberroland22-Nov-00 7:14 
    GeneralWhere can i Find...... Pin
    Jon13-Jul-00 6:18
    sussJon13-Jul-00 6:18 
    GeneralMessage Closed Pin
    11-Jan-00 23:04
    sussalex11-Jan-00 23:04 

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