Reading level setting computer microphone

I have an application that uses the computer's sound card line to save audio files of outputs provided from another source.  We have several systems that receive these audio inputs of different devices and their audio to different output levels of each of these devices.  I have build a sequence of events that change the microphone level upwards or downwards to match the entry to a known sample level.  It uses the APPCOMMAND WM to change the volume of the microphone, see attached VI.

What I'm trying to do is now made the microphone level after my sequence so I can refer to it later in the report.  The problem with the WM APPCOMMAND is that there is no feedback, I can only change up and down where it should be.

I looked everywhere for the examples and it seems to help the Winmm.dll mixer settings, I should be able to get this information but everyone I try does not work.  From my research, it seems that he might work for Windows XP, but it changes in Windows VISTA and capable.  We are running Windows 7.  The other problem I have with examples is that they are all for the adjustment of the volume level and I want to read explicitly what level it's on.

From my research I am reading the setting of the audio endpoint device and it might be able to do away with dsound.dll or MMDevice API, but I couldn't find a way to use one of these to do what I'm doing.

I searched all over the Internet and more time on it then I would have so I thought I'd post here to see if anyone else had any suggestions of sepent.

Thanks in advance.

Julia,

Yes, I had looked at this link, and it's on the right track.  After all my research I understood that you needed to use MMDevices and Audio endpoints, but I didn't know how to implement it.  One of my co-workers have been able to help me with this.

I have attached all of the code required to make it work.  It's a beautiful VI bit so give it a try and let me know what you think.

Something to note is in my opinion, this will not work with Windows VISTA and above.

Tags: NI Software

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