C# Get list of audio processes

Question

I'm trying to get a list of processes that have audio. The processes that display in Volume Mixer.

Currently I have:

var currentProcess = Process.GetProcesses();
foreach (Process Proc in currentProcess.Where(p => p.MainWindowHandle != IntPtr.Zero))
{
     Console.WriteLine(Proc.ProcessName);
}

Which list applications that have a window, is there a way to filter this further to only display audio processes?

Thank you!

This is going to likely require calls into the Windows Core Audio APIs that exist in Windows Vista and newer. Unfortunately, this is a C++ API and doesn't expose a .NET interface. — Powerlord, Aug 26 '18 at 21:24
check this out - https://stackoverflow.com/questions/938955/detect-processes-using-audio-on-windows — Ctznkane525, Aug 26 '18 at 22:02

score 5 · Accepted Answer · answered Aug 27 '18 at 00:53

Thanks to this post
I was able to modify one of the methods to return all of the audio processes

    public static List<Process> GetAudioProcesses()
    {
        IMMDeviceEnumerator deviceEnumerator = null;
        IAudioSessionEnumerator sessionEnumerator = null;
        IAudioSessionManager2 mgr = null;
        IMMDevice speakers = null;
        List<Process> audioProcesses = new List<Process>();
        try
        {
            // get the speakers (1st render + multimedia) device
            deviceEnumerator = (IMMDeviceEnumerator)(new MMDeviceEnumerator());
            deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out speakers);

            // activate the session manager. we need the enumerator
            Guid IID_IAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
            object o;
            speakers.Activate(ref IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
            mgr = (IAudioSessionManager2)o;

            // enumerate sessions for on this device
            mgr.GetSessionEnumerator(out sessionEnumerator);
            int count;
            sessionEnumerator.GetCount(out count);

            // search for an audio session with the required process-id
            for (int i = 0; i < count; ++i)
            {
                IAudioSessionControl2 ctl = null;
                try
                {
                    sessionEnumerator.GetSession(i, out ctl);
                    ctl.GetProcessId(out int cpid);

                    audioProcesses.Add(Process.GetProcessById(cpid));
                }
                finally
                {
                    if (ctl != null) Marshal.ReleaseComObject(ctl);
                }
            }

            return audioProcesses;
        }
        finally
        {
            if (sessionEnumerator != null) Marshal.ReleaseComObject(sessionEnumerator);
            if (mgr != null) Marshal.ReleaseComObject(mgr);
            if (speakers != null) Marshal.ReleaseComObject(speakers);
            if (deviceEnumerator != null) Marshal.ReleaseComObject(deviceEnumerator);
        }
    }

C# Get list of audio processes

1 Answers1