internal AudioMeterInformation(IAudioMeterInformation realInterface) { int hardwareSupp; audioMeterInformation = realInterface; Marshal.ThrowExceptionForHR(audioMeterInformation.QueryHardwareSupport(out hardwareSupp)); hardwareSupport = (EEndpointHardwareSupport)hardwareSupp; channels = new AudioMeterInformationChannels(audioMeterInformation); }