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get actual audio output level

Posted on 2010-09-02
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Last Modified: 2013-12-17
how to programmatically sample the current level of audio output to the default sound card in windows? this is NOT a question about how to detect the volume i.e. it could be silent nothign coming out of the speakers, but the volume setting could still be high: the question is how to determine the actual output stream level sent to audio card, something that i imagine is used for VU meters or oscilloscopes in any media player application.

any help would be much appreciated, ideally for vb.net, but any other vs language is good too.
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Question by:KristjanLaane
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Jaime Olivares earned 2000 total points
ID: 33613148
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by:KristjanLaane
ID: 33613957
Wow, great links! Ill try them out!
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Author Closing Comment

by:KristjanLaane
ID: 33613966
Wow, great links! Ill try them out!
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Author Comment

by:KristjanLaane
ID: 33617465
i the AnalogSignalMeter to work, but turns out the source is the default input device/Microphone for it, rather than the default output device: is there a way to change that?

e.g. i could access teh default speakers with
audioDevices = new DevicesCollection();
instead of
audioDevices = new CaptureDevicesCollection();

but the rest of that code does not work with a DevicesCollection instance, its made to work with CaptureDevicesCollection instance only ... any chance you know how to fix that or if there is another source out there that is coded for output device metering?
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by:KristjanLaane
ID: 33617486
or to be more precise, the code is written to work with, which only enables work with input devices:

new Capture(audioDevices[currentDeviceIndex].DriverGuid);

but the code does not work with:

 new Microsoft.DirectX.DirectSound.Device(audioDevices[currentDeviceIndex].DriverGuid);

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