Windows Sound Mixer

[TheVig]

Anybody with any information for controlling windows audio mixer?

Examples:
Playback=>Audio Mixer=>Mute Line Out, Mute CD Player, and set Volume on Wave to a specific number.

Recording=>Select Stereo Mix+ Set Fader to certain value.

Thanks,
Jimmy Vig

[Gintaras]

Can use Windows API mixer functions. It is difficult. Completely different on Vista and XP. See SetAudioVolume sample in first topic in Resources subforum.

Easier way - find a COM (ActiveX) component. But most are not free. Some may not work on Vista.

[TheVig]

Gint,

I was able to set using this in the SetAudioVolume function:

Code:

Copy      Help

MIXERCONTROLDETAILS mxcd.cbStruct=sizeof(mxcd)
    mxcd.dwControlID=18;;change around for right Mixer Slider or mute checkbox.
    mxcd.cChannels=1
    mxcd.cbDetails=sizeof(int)
    mxcd.paDetails=&vi;;0 will unmute and 1 will mute checkbox
    if(mixerSetControlDetails(0 &mxcd MIXER_OBJECTF_MIXER|MIXER_SETCONTROLDETAILSF_VALUE)) ret

It only lets you change options for the playback section on what ever sound card is set as the default device.
I now need to change options on the record section of the sound card! Any ideas how this can be done.

Thanks,
Jimmy Vig

[Gintaras]

Try to find source code, for example in codeproject.com. If it is in C++, possible to convert to QM.

[TheVig]

This is exactly what I want. Full control over the Windows Mixer...
http://www.codeproject.com/KB/audio-video/AudioLib.aspx

but of course it is in C# and not C++...Do I really know the difference...No, but I do know that the dll that comes in the source code does not successfully load in QM. Do I know why...nope.

I'll keep looking for something in C++...and hopefully I'll get somewhere on this.

thanks,
jim