Displaying a Recording Level Indicator

The properties EnableSoundInputQuery, SoundInputMaximum and SoundInputValue can be used to get sound input levels in real time from the currently selected recording source.

The PCSoundsMicSoundInputValue and PCSoundsMicSoundInputMaximum properties can also be used when recording the PC Sounds and Microphone sources simultaneously on Windows Vista / 7 to read the levels of the Microphone source. This enables dual recording level indicators - one for PC Sounds and one for the Microphone.

After setting the recording source via the SoundDevice and SoundSource properties (VistaSoundSource property for Windows Vista), set EnableSoundInputQuery to true, and poll the SoundInputMaximum and SoundInputValue properties on a timer to enable display of a recording level indicator.