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Editorial Team
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Asked: 2026-05-26T11:50:22+00:00

I am working on an windows forms program which listens to all of the

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I am working on an windows forms program which listens to all of the active audio input devices using NAudio. The problem I am running into is if an there is only one audio input device is plugged in at the beginning of recording then is removed before the recording ends I received an unhandled MMException with an MMResult of MMResult.NoDriver.

Since I am using the WaveIn.StartRecording() method, which works in another thread I assume, the exception gets thrown up to the main method without being caught.

Does anyone have any suggestions on what I can do to safely continue recording or maybe stop the recording until the device is plugged back in?

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  1. Editorial Team

    There is a solution in the NAudio discussion.

    You need to get the source code fix (aka fork) from here and compile it (only x86) for yourself.

    bobasaurus: This just changes part of the wavein callback code to cleanly stop recording if the recording device has a problem (like being disabled from pulling the cable on some Win 7 boxes). It will call the RecordingStopped event when this happens. I implemented this event handler in my main program’s GUI controller, which, if it detects that WaveIn.DeviceCount is 0, will start a timer that will poll WaveIn.DeviceCount until it’s back above 0 and restart the recording.

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