Events > VUMeterValueChange event

Remarks

Occurs whenever there is a change on the VU-Meter peak values: this event, generated every 15 milliseconds, can be useful if you need to implement your own VU-Meter graphical representation.

For regular mono or stereo streams, peak levels are reported inside the nLeftPeak and nRightPeak parameters: in case you should need to retrieve peak levels or RMS (Root-Mean-Square) levels for each of the channels of a multi-channel audio stream, you could use the StreamPeakLevelsGet method.

For details about using graphic bars refer to the How to perform custom feedbacks rendering using graphic bars section.

For further details about synchronization through Events see the How to synchronize the container application through events tutorial.

Syntax

[Visual Basic]

Public Event VUMeterValueChange As VUMeterValueChangeEventHandler

[C#]

public event VUMeterValueChangeEventHandler VUMeterValueChange;

[C++]

public: __event VUMeterValueChangeEventHandler VUMeterValueChange;

Event Data

The event handler receives an argument of type VUMeterValueChangeEventArgs having the following parameters:

Parameters	Description

nLeftPeak	Number representing the peak value for the left channel: can assume values from 0 (no sound) to 32767 (max volume).
nRightPeak	Number representing the peak value for the right channel: can assume values from 0 (no sound) to 32767 (max volume). If the sound is in Mono, the nLeftPeak and nRightPeak parameters assume the same value.