README.md

Argus Framework

Argus.NAudio

This library currently includes the only addition I've needed to NAudio which is a loopback recorder that is capable of recording what is currently being played through the soundcard.

C# Example Recording from the Default Audio Device

This example is on a WPF window with a button named ButtonRecord and it places a file located at C:\Temp\test.wav.

private Argus.Audio.NAudio.LoopbackRecorder _recorder = new Argus.Audio.NAudio.LoopbackRecorder();

private void ButtonRecord_Click(object sender, RoutedEventArgs e)
{
    if (_recorder.IsRecording)
    {
        this.Title = $"The final recording was {_recorder.ElapsedSeconds()} seconds.";
        _recorder.StopRecording();
        ButtonRecord.Content = "Record";

    }
    else
    {
        _recorder.StartRecording(@"C:\Temp\test.wav");
        ButtonRecord.Content = "Stop";
    }
}

// Sets up a recorder on the default device that's active.
var recorder = new LoopbackRecorder();

By not specifying a parameter in the constructor of LoopbackRecorder it sets itself to use the default device on the computer. In order to set your own device a specific device you'll want to turn off the auto setup via passing a false to the constructor:

C# Example: Setting a Specific Audio Device

// Setup the recorder but DON'T wire up the default device
var recorder = new LoopbackRecorder(false);

To get a list of the devices NAudio provides an MMDeviceEnumerator which the LoopbackRecorder has put into the Devices property. With this you can specific a device by name or you can enumerate through the list it has and choose.

// Loop over each active audio device
foreach (var item in recorder.Devices.EnumerateAudioEndPoints(DataFlow.Render, DeviceState.Active))
{
    if (item.AudioDevice.FriendlyName == "NVIDIA - High Definition Audio")
    {
        recorder.AudioDevice = item;
        break;
    }
}

.Net Framework Support

• .NET 7
• .NET 6
• .NET Framework 4.7.2

• Previous releases may have additional targets for older frameworks.

Historical Note

Back in 2012 I had included an older version of this in a blog post and had noticed recently that it had propagated into 25-30 respositories and I thought a cleaned up version and Nuget package might be useful.

https://www.blakepell.com/2013-07-26-naudio-loopback-record-what-you-hear-through-the-speaker